December 2024

v>EPA

United States
Environmental Protection
Agency


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December 2024

Data Entry Guide for the Key Category Analysis

(KCA)Tool

KCA Tool Version 3.0

United States Environmental Protection Agency

EPA-430-B-240-03

December 2024

Contact Us: https://www.epa.gov/ghgemissions/forms/contact-us-about-greenhouse-gas-emissions
Tool Support: ghgi.transparency@epa.gov

EPA's Capacity Building for National Greenhouse Gas Inventories website:

https://www.epa.gov/ghgemissions/capacity-building-national-greenhouse-gas-inventories

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Acknowledgements

The Environmental Protection Agency would like to acknowledge the key individual and organizational
contributors to this document and tool, without whose efforts this guide would not be complete.

Within EPA's Office of Atmospheric Protection (OAP), development of the key category analysis tool was
led by Amanda Chiu, Mausami Desai, Yasmine Farhat, Keyle Horton, Christopher Sherry, and John
Steller. Martin Wolf as an AAAS Science & Technology Policy Fellow hosted by the EPA Office of Air and
Radiation, supported review of the guidance and tool.

We thank Abt Global for their technical support in developing the key category analysis tool, including
Jason Goldsmith, Marissa Hoer, Matt Pasquali, and Olivia Salmon.

We thank the countries that volunteered their experts' time to review the key category analysis tool as
potential users: Maria Lourdes Manrique, Eluney Deliens, and Macarena Maia Moreira Muzio from
Argentina; Rumbidzai Mhunduru from South Africa; and Treina Dinoo Ramlochan from Trinidad and
Tobago.

We thank Aether for providing support in reviewing and developing the key category analysis tool,
including Rosie Brook and Justin Goodwin.

We thank Ricardo for providing support in reviewing the key category analysis tool, including Sina
Wartmann.

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Table of Contents

Acknowledgements	3

Table of Contents	4

Table of Figures	5

Background	6

Introduction to Version 3.0 of the KCATool	6

Tool Framework	8

Tool Overview	10

Step-by-Step Instructions for using the KCATool	13

Step 1: Getting Started - Entering Key Parameters	13

Step 2: Enter Emissions and Removals Data and Uncertainty Values	15

Step 3: Review Approach 1 and Approach 2 Emissions and Removals	18

Step 4: Review Approach 1 and Approach 2 Level and Trend Assessments	21

Step 5: Review Key Categories	26

Step 6: Review Notation Key Summary	29

Additional Information	30

Appendix 1: Reference Information	31

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Table of Figures

Figure 1. KCATool Colors Reference Guide	8

Figure 2. Flow Chart of the KCA Tool	9

Figure 3. KCA Tool Instructions Tab Link and Next/Back Button Example	10

Figure 4. KCA Tool "KCA Parameters" Tab	15

Figure 5. KCA Tool "1. KCA Input - Energy" Tab Showing "See Disaggregated" Dropdown Menu	16

Figure 6. KCA Tool "1. KCA Input - Energy" Tab Showing Where Data Entry is Required	17

Figure 7. KCA Tool "1. KCA Input - Energy" Tab Showing Uncertainty Values	18

Figure 8. KCA Tool "7. Approach 1 Level and Trend" Tab Showing Table 7-1, Which Includes LULUCF

Categories	19

Figure 9. KCA Tool "7. Approach 1 Level and Trend" Tab Showing Table 7-2, Which Excludes LULUCF

Categories	19

Figure 10. KCA Tool "8. Approach 2 Level and Trend" Tab, Showing Uncertainty Values in Table 8-1	20

Figure 11. 2019 Refinement - Equation 4.2 Trend Assessment (Approach 1)	21

Figure 12. 2006 IPCC Guidelines - Equation 4.2 Trend Assessment (Approach 1)	21

Figure 13. KCATool "7a. Approach 1 KCA LULUCF" Tab	23

Figure 14. KCATool "7b. Approach 1 KCA No LULUCF" Tab	24

Figure 15. KCATool "8a. Approach 2 KCA LULUCF" Tab	25

Figure 16. KCATool "8b. Approach 2 KCA No LULUCF" Tab	26

Figure 17. KCATool "9. Key Results" Tab Layout	27

Figure 18. Threshold Values Reference Box from KCATool "9. KCA Results" Tab	27

Figure 19. KCA Tool "9. KCA Results" Tab	28

Figure 20. KCA Tool "10. Notation Key Summary" Tab	29

Figure A-l. Definitions Table from the KCA Tool "General Information" Tab	31

Figure A-2. Acronym Table from KCATool "General Information" Tab	32

Figure A-3. Notation Key Table from KCATool "General Information" Tab	32

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Background

The U.S. Environmental Protection Agency (EPA) has developed tools to help developing countries build
their institutional capacity to establish, maintain, and improve sustainable inventory management
systems, which facilitate and support preparing complete, high-quality greenhouse gas (GHG)
inventories using the 2006 Intergovernmental Panel on Climate Change Guidelines (2006 IPCC
Guidelines) and the 2019 Refinement of the 2006 IPCC Guidelines (2019 Refinement) on a biennial basis.

The Key Category Analysis (KCA) Tool was developed by EPA to help facilitate the identification and
reporting of sources and sinks that make the greatest contribution to national GHG emissions and
removals. This analysis can help guide national GHG inventory teams in prioritizing improvements and
associated allocation of resources to improve their national GHG inventory. This tool applies the
guidance in the 2006 IPCC Guidelines, Volume 1, Chapter 4 on Methodological Choice and Identification
of Key Categories. As part of reporting requirements of the Enhanced Transparency Framework (ETF)
under the Paris Agreement, all countries will be required to report national GHG inventories consistent
with the 2006 IPCC Guidelines, including findings from a KCA. Review the Modalities. Procedures and
Guidelines (MPGs) for more information, but the requirements are noted in the introduction following
this section. Countries may also use the 2019 Refinement, which includes some updates for
implementing the KCA (i.e. the trend analysis).

The concept of key categories was created by the IPCC as a way to help countries prioritize resources for
improving national GHG inventories. Key categories are sources and sinks that are the most significant
contributors to national emissions and removals. According to the 2006 IPCC Guidelines, "a key category
is one that is prioritized within the national inventory system because its [emission] estimate has a
significant influence on a country's total inventory of greenhouse gases in terms of the absolute level,
the trend, or the uncertainty in emissions and removals." In other words, a category may be identified
as key if it is a large contributor to total emissions, has a high rate of change over time, or has high
uncertainty.

This KCA Tool is a standalone tool and requires inventory data for at least two years (i.e., the
Initial/Base1 and Current Year2 of the reported time series) to complete a KCA. This tool complements
the documentation template, which documents the sources and sinks that make the greatest
contribution to national GHG emissions and removals and helps the National Inventory Coordinator
(NIC) or the KCA lead in preparing their country's national GHG inventory data for use in the KCA tool,
for an inventory management system.

Introduction to Version 3.0 of the KCA Tool

This is Version 3.0 of the KCA Tool. Version 3.0 includes functional improvements to the tool to make it
more user-friendly, and methodological changes to align with the 2019 Refinement. This tool provides a

1	The Initial/Base Year is the starting year for the national GHG inventory time series. See the MPGs for information
on reporting requirements for time series, including start year (See Chapter II of Annex to 18 CMA.l).

2	The Current Year is the most recent year included and compiled for the national GHG inventory. See the MPGs for
information on time series reporting requirements, including requirements and flexibility in relation to latest
reported year in time series (See Chapter II of Annex to 18 CMA.l).

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way for countries to identify key categories under two approaches consistent with the IPCC guidelines:
Approach 1 and Approach 2.

Approach 1 key category assessment assesses the relevance of each category compared to total national
emissions in the Current Year ("level assessment"), and its influence on the overall trend when
comparing the Current Year and the Base Year ("trend assessment"). Approach 1 key category
assessment is completed without incorporating information on uncertainty. Under MPG paragraphs 25,
41, and 42, countries are required to complete an Approach 1 analysis. Specifically, countries shall

IPCC Inventory Software, ETF Reporting Tools, and
KCA Tool

If using the IPCC Inventory Software to compile the
GHG Inventory, the KCA Tool within that software has

the capability to compute the KCA based on the
software-compiled GHG inventory. The ETF Reporting
Tools also include functions to produce an Approach 1
KCA based on your reported inventory time series. The

KCA Tool developed by EPA can be used as quality
check of the KCA produced by the IPCC software or ETF
Reporting Tools, noting these tools produce a default
Approach 1 level and trend analysis. The main
difference with this tool is it allows for more
customized disaggregation beyond the default
disaggregation as compared to the IPCC Inventory
Software and ETF reporting tools. The updated tool
also includes a table summarizing categories reported
as "NE" or not estimated for improvement planning, to
allow for qualitative consideration of whether
categories currently not estimated should be
considered "key."

below.

Approach 2 key category assessment also performs the level and trend assessments, but in doing so
incorporates information on uncertainty in the analysis. Approach 2 is not required under the MPGs, but
countries are encouraged to apply this approach if they have quantified uncertainties.

A level assessment is the absolute level of emissions and removals for a particular year of interest, while
a trend assessment is used to identify categories that may not be large enough to be identified by the
level assessment, but whose trend is significantly different from the trend of the overall inventory and
should therefore receive particular attention.

Before beginning, review the 2006 IPCC Guidelines, Volume 1, Chapter 4, Section 4.2 and Table 4.1 for
guidance on the suggested levels of disaggregation of source and sink categories for organizing
inventory information for data entry to conduct a key category analysis. This guidance is particularly

identify key categories for the starting year
(e.g., 1990 or 2020) and latest reporting
year (e.g., 2022), both including and
excluding land use, land use change and
forestry (LULUCF) categories, using
Approach 1 for both the level and trend
assessments, and also show the individual
and cumulative percentage contributions
from key categories, for both level and
trend (see Step 4 below to compile this
information). Countries shall also describe
the key categories, including information
on the approach used for their
identification, and information on the level
of disaggregation used (e.g. default
disaggregation from 2006 IPCC Guidelines
provided in Table 4.1 or default
disaggregation in ETF Reporting Tool). The
analysis is performed with and without the
LULUCF sector to understand its influence
on overall GHG levels and trends.

Reporting includes flexibilities for
developing countries discussed further

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useful if preparing a KCA for the first time. The Special Considerations in Table 4.1 provide guidance for
further disaggregation of key categories to refine the KCA and prioritize inventory improvements.3

Too! Framework

The KCA Tool first requires users to enter background information and input data for each Common
Reporting Table (CRT) sector. Based on the information and data provided by the user, the tool provides
results in several output tables.

The tool uses shaded cells and colored tabs to help the user enter data and navigate the tool; Figure 1
provides a quick color reference guide. Data entry input cells are shaded BELLOW .and uncertainty value
input cells are shaded ORANC5E throughout the tool.

The color of the KCA Tool tab indicates its purpose:

•	The	tabs provide overview information and instructions on how to use the tool,

•	The DARK BLUE tabs are for user input.

•	The BLUE tabs summarize data entered into the DARK BLUE tabs and perform the key category
analysis.

•	The	tab provides a summary of all key categories.

•	The DARK GREY tab provides a summary of categories with notation key(s) for each sector.

•	The BLACK tabs provide a reference to the IPCC AR5 (Fifth Assessment) and IPCC AR6 (Sixth
Assessment) global warming potential (GWP) values and a crosswalk of IPCC category codes with
this tool

Figure 1. KCA Tool Colors Reference Guide

Excel Tool Tabs



KCA 	 "TUHn

¦MHHNHMM ^B£iiTjj]jj£jj^^|





Results

Excel Cells









Data entry input







Uncertainty value
input

























Figure 2 provides a flow chart for navigating through the tool. The top row shows the introductory and
background information tabs, the middle row shows the data entry sector tabs, the third row shows the
level and trend assessment, Approach 1, and Approach 2 tables. The IPCC category codes and global
warming potential (GWP) tabs are included as references for the user. Detailed information on each of
these KCA Tool tabs is provided in this document.

3 The 2019 Refinement also includes minor updates to Table 4.1 that you may want to consider as well, including
reflecting new categories introduced in the Refinement itself.

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Figure 2. Flow Chart of the KCA Tool

The KCA Tool begins with the tab. This tab provides information on the version and date that the
tool was last updated as well as tool support, contact information, and the EPA inventory capacity
building website.

The	tab presents an overview of the tool's contents, includes brief descriptions of each tab,

and provides direct links to each tab.

The	tab provides an overview of a key category analysis, links to relevant

background information, and defines terms, acronyms, and the notation keys for DARK BLUE KCA Input
- Sector data input tabs numbered 1 - 6.

The	tab provides an overview of the steps needed to complete the key category analysis.

Each data entry tab has a link at the top to easily navigate back to the Instructions tab (see Figure 3 for
an example of where to find the	tab link on each data entry tab).

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Except for the and Reference tabs, clickable 'Back' and 'Next' buttons are located on the top right
of each sheet to easily navigate between tabs (Figure 3),

Figure 3. KCA Tool Instructions Tab Link and Next/Back Button Example

11. KCA Input - Energy

Back

Next

| Instructions |
Notation Key

Click the 'Instructions' shortcut link for a detailed, step by step on how to enter GHG category-level emissions and/or removals data.

Note: If additional categories or subcategories are included in a GHG inventory that are not already included in this tool, enter the CRT code,
category title, and GHG in the blank rows at the end of the table.
s Click the 'Notation Keys' shortcut link to visit the 'General Information1 tab for the complete list of notation keys and definitions.

Note: If you have an aggregated value it is still helpful to enter a notation key for the disaggregated categories for the qualitative summary.



Tool Overview

The next sections of the Data Entry Guide walk users through detailed steps for selecting parameters

and entering data to complete the key category analysis. Briefly, these steps are:

•	Organize inventory data following the guidance in the 2006 IPCC Guidelines section 4.2 of Chapter 4
to facilitate entry of data into the KCA Tool. Organizing inventory data by CRT sector, subsector,
category, subcategory, gas, and year will facilitate your KCA, entry of data into this tool, and data
entry into future ETF reporting tools. As stated in section 4.2 of Chapter 4, "disaggregation to very
low levels should be avoided since it may split an important aggregated category into many small
subcategories that are no longer key."

Notes:

•	An optional standalone Data Entry Sheet is provided to help users organize their inventory
data. The Data Entry Sheet mirrors the DARK BLUE KCA Input - Sector data input tabs in the
tool. The user may populate the Data Entry Sheet with their country's inventory data for
every sector to facilitate populating or copying data to DARK BLUE KCA Input - Sector data
input tabs in the tool.

•	Do check that categories are not being double counted, (i.e. if including disaggregation of a
category, do not include the category total emissions as well).

•	Select the parameters of the KCA in the KCA Parameters tab. First, enter the Base Year1 and Current
Year2. Select the version of the IPCC Assessment Report you will use for GWP conversions (IPCC AR5
or IPCC AR6). Note that GWPs for the IPCC Fifth Assessment (AR5) are the default values for this tool
and the GWPs for the IPCC Sixth Assessment (AR6) are included here for comparative purposes only.
Next, select the KCA Threshold you will use for the Approach 1 Assessment (from 85% to 95%).
Starting in 2024, with the first biennial transparency report (BTR), the GWP values in use should be
AR5. Select the 2006 IPCC Guidelines equation (2006 equation) or 2019 Refinement equation (2019
equation) you will use for the trend assessment.

•	If activity was not occurring in Base Year (i.e., emissions and removals are zero in that year),
or the first year of available data for a category is later than the selected Base Year, you can
instead use the emissions/removals value from the first year when the activity started as the
Base Year.

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•	If activity for a category was not occurring in the Base Year and 2006 IPCC Guidelines,
Volume 1, Chapter 4, Equation 4.2 is selected for the trend analysis, the trend assessment is
the same as the level assessment.

•	See the 2006 and 2019 equations in the KCA Parameters tab and the discussion in 'Step 3:
Review Approach 1 and Approach 2 emissions and removals' later in this guide for more
information.

•	Enter GHG category-level emissions and/or removals data for the Base and Current Years by sector
in DARK BLUE KCA Input - Sector data input tabs numbered 1- 6. In these tabs, data entry is
required in the ViyjQiW shaded cells. Emissions and/or removals data can be entered in the bolded
category rows (i.e., Fuel Combustion - Energy Industries) or a subcategory row (i.e., Fuel
combustion - Energy Industries - Liquid Fuels), dependent on the available data disaggregation. If
you have disaggregated data available to use in a subcategory row, please select "See
Disaggregated" from the dropdown menu for the higher category row in the 'Base Year Estimates
(kt)' and/or 'Current Year Estimates (kt)' columns. Then enter the disaggregated data in the
subcategory rows below. If you start entry with aggregated data and realize later that you have
disaggregated data you would like to use in a subcategory row, please be sure to change the
aggregated row to "See Disaggregated" from the dropdown menu so as to not double count data
values. The CRT codes are included in each of the DARK BLUE KCA Input - Sector data input tabs in
the 'CRT Code' column (column B). See the crosswalk for IPCC and CRT codes in the IPCC Codes tab.4

If additional categories or subcategories are included in a GHG inventory that are not already
included in this tool, enter the CRT code, category title, and GHG in the blank rows at the end of the
table. Refer to the CRT tables to identify CRT codes, available here:

https://unfccc.int/documents/311076. Follow the instructions in the 'Data Source' box in each of
the seven DARK BLUE KCA Input - Sector data input tabs to document the source of the data.

•	For required data entry rows where you do not have data or are including data in a more
disaggregated CRT category, enter a notation key (descriptions found in the	(formation
tab) for each category indicating why data are not reported for the Base Year and/or Current Year. If
you have an aggregated value, it is still helpful to enter a notation key (e.g., included elsewhere (IE))
for the disaggregated categories for reporting a qualitative summary of KCA findings. Emissions and
removals data for each gas must be entered in kilotons (kt) in the 'Base Year Estimates (kt)' and
'Current Year Estimates (kt)' columns.5 The kt carbon dioxide equivalent (C02e) will be automatically
calculated based on this input. If data are considered confidential, consider reporting emissions at a
higher level of aggregation (e.g., category instead of subcategory) in order to assess significance
through the KCA and enter "C" as the notation key for lower levels of disaggregation. See below for
special instructions regarding the 'Industrial Processes and Product Use (IPPU)' and 'Agriculture'
sectors:

4	Learn more about mapping of categories from CRT and 2006 IPCC guidelines here:
https://unfccc.int/documents/634242.

5	Kt is the unit used in CRT and has been applied to this tool for consistency. Kt and Gigagram (Gg) are the same
unit of measurement.

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For the 'IPPU' sector, there are two DARK BLUE KCA Input - Sector data input tabs, tabs 2a and
2b.

o Enter data for the 'IPPU' sector into the 2a. KCA Input - IPPU tab.

o Use the 2b. KCA Input - IPPU F-gas tab to enter all F-gas emissions reported in the 'IPPU'
sector.

¦	For CRT codes '2.F.6 Other Applications' and '2.H Other', select the gas from the
dropdown menu in the 'Greenhouse Gas' column before entering emissions
values.

¦	Emissions data entered in the 2b. KCA Input - IPPU F-gas tab are summed
together and used in the 2a. KCA Input - IPPU tab to summarize all emissions
and/or removals in this sector.

¦	There is a row under each industry to input an F-gas that is not listed. These
rows are identified as 'Entry Optional' to indicate that data entry here is not
required. For these rows, enter the F-gas name in the 'Greenhouse Gas' column
and enter the name of the F-gas and GWP of the gas into the tables on the GWP
tab. If the F-gas and corresponding GWP are not entered in these tables, the
emissions will not be calculated to C02e.

For the 'Agriculture' sector, the 3. KCA Input - Agriculture tab, there are additional rows under
both Enteric Fermentation (3.A.4) and Manure Management (3.B.4) to enter 'other livestock'
not captured by the categories listed. These rows are identified as 'Entry Optional' to indicate
that data entry here is not required. For these rows, only the name of the livestock has to be
entered in the 'Category Title' column.

Enter uncertainty values in the	shaded cells on the DARK BLUE KCA Input - Sector data

input tabs. This optional information will provide the user with an Approach 2 assessment in
addition to an Approach 1 KCA assessment. It is highly encouraged to complete an Approach 2 KCA
assessment if uncertainty data are available. If uncertainty data are not available, leave all columns
blank. Enter the uncertainty data (in % values - e.g., enter 5 for 5%, not 0.05) into the (QiIMJ®!!
shaded cells in the 'Activity Data Uncertainty' and/or 'Emission Factor Uncertainty' columns. Use the
'Combined Uncertainty' column if the user has one uncertainty percentage that accounts for both
activity data and emissions factor data. Note that if the activity data and emission factor uncertainty
reported are not the same value, the larger uncertainty value should be used. Uncertainty values
will always be a positive number. See the "Uncertainty Values" section under "Step 2: Enter
Emissions and Removals Data and Uncertainty Values" for more information on uncertainty.

While entering GHG category-level emissions and/or removals data in the DARK BLUE KCA Input -
Sector data input tab, view the 'Status Tracker' box at the top of tab to see how many remaining
categories need data entry before proceeding to the next DARK BLUE KCA Input - Sector data input
tab. These emissions data entered are used in the other worksheets to determine the key categories
based on the level and trend assessment. Note that the KCA Input - Other tab does not have a
Status Tracker as all entries on this input tab are optional.

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•	View summary reports in the 3LUE tabs. These summary reports correspond to the data entered in
the DARK BLUE KCA Input - Sector data input tabs, and also contain a summary of the Approach 1
Level and Trend assessments - and Approach 2 assessments, if applicable.

•	The 7. Approach 1 Level and Tren tab provides a summary of tabs 7a. Approach 1 KCA

LULUCF, the analysis of Approach 1 Level and Trend Analysis including LULUCF, and 7b.
Approach 1 KCA No LULUCF, the analysis of Approach 1 Level and Trend Analysis excluding
LULUCF. Key categories are shaded in GREEIN for the threshold selected by the user and
for the 95% threshold.

•	The J. Approach 2 Level and Tren tab provides a summary of tabs 3a. Approach 1 KCA

LULUC , the analysis of Approach 2 Level and Trend Analysis including LULUCF, and 8b.
Approach 2 KCA No LULUCF, the analysis of Approach 2 Level and Trend Analysis excluding
LULUCF. Key categories are shaded in	up to the 90% threshold.

•	View the . KCA Result tab for a summary of key categories identified in tabs 7<, 7 , 8 , and 8b.

•	View the 10. Notation Key Summary tab for a summary of the categories that are not estimated for
each sector.

Tips

•	Definitions, acronyms, and additional resources are provided in the	iformation
tab.

•	Links to the nstructio tab as well as definitions of each notation key are shown in GREY
boxes at the top of each DARK BLUE KCA Input - Sector data input tab and at the beginning
of key data input sections.

•	Users have the option to break links from external data source files in the workbook
application. To do so, users can click on 'Data' in the top ribbon>Queries & Connections>
Workbook Links. The values are then hard pasted from the external source.6

Step-by-Step Instructions for using the KCA Tool

The following Steps 1-6 provide detailed instructions to walk users through the process of selecting
parameters and entering data into each tab on the KCA Tool to complete the Key Category Analysis.

Step 1: Getting Started - Entering Key Parameters

The user input tabs are in DARK BLUE. Users begin by inputting or selecting key information in the KCA
Parameters tab.

6 Data path specified corresponds to Microsoft 365 Excel Version 2410 and may be different for other versions of
Excel.

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In the KCA Parameters tab (Figure 4):

•	Enter the Base Year and Current Year (see definitions in
Appendix 1). The years entered in this tab are visible in the
supplemental tabs as a reference.

•	Select the version of the IPCC Assessment Report to use for
GWP conversions.

•	Select the KCA Threshold from the dropdown list to use for
the Approach 1 Assessment. The KCA threshold is used to
identify key categories that, when summed together in
descending order of magnitude, add up to that percentage
of the total level.

In the Approach 1 methodology, key categories are identified using a pre-determined cumulative
emissions threshold, where key categories are those that sum to 95 percent of the total level when
summed together in descending order of magnitude.

Developing countries have the flexibility to identify key categories using a threshold between 85-95
percent, instead of the 95 percent threshold defined in the 2006 IPCC Guidelines, allowing a focus on
improving fewer categories and prioritizing resources. Under the MPGs, countries that apply this
flexibility are required to clarify capacity constraints to using the higher threshold in their KCA and
provide a self-determined estimated timeframe for improvements in relation to those constraints. The
final list of key categories may change based on the selected threshold.

Users can select the equation to use for the trend assessment from either the 2006 IPCC Guidelines or
the 2019 Refinement. One principal difference between the two equations is that the 2019 equation
accommodates scenarios where emissions or removals were zero in the Base Year. If activity was not
occurring in the Base Year (i.e., emissions and removals are zero in that year), users can also select the
2006 equation and apply the emissions/removals value from the first year when the activity started as
the Base Year. If using the 2006 equation for the trend analysis and activity for a category was not
occurring in the Base Year, the trend assessment is the same as the level assessment. If countries use
the 2019 equation, they should clarify as part of documentation in their national inventory document
why the 2019 equation is more appropriate for their national circumstances. See each equation below
the key parameters table in the KCA Parameters tab and the discussion in Step 3 below for more
information.

Once the Base and Current Years are entered and the GWP and KCA Threshold are selected, the Status
Tracker box on the KCA Parameters tab will turn green, allowing you to click Begin Data Entry in the
Status Tracker to begin the data entry process (see Figure 4).

Note on Reporting Years:

The latest reporting year should be no
more than two years prior to the
submission of a country's national
inventory report. Developing countries
have a flexibility provision for the
latest year reported to be no more
than three years prior to the
submission year (e.g. if submitting
report in 2024, latest inventory year if
using flexibility would be 2021).

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Figure 4. KCA Tool "KCA Parameters" Tab

Key Category Analysis Parameter Input

This is the KCA Parameter Input worksheet. To start the Key Category Analysis, enter in all required input fields in the	shaded cells in the tables below.

1.	Enter the Base Year and Current Year in the 'Key Category Analysis Year' table below.

Best Practice Tip: The Current Year should be no more than two years prior to the submission of a country's national inventory report. Developing countries have the flexibility
to instead have their latest reporting year as three years prior to the submission of their national inventory report.

2.	Select the version of the IPCC Assessment Report you will use for Global Warming Potentials by using the dropdown in the 'Global Warming Potentials (GWPs)' table below. Note that GWPs
for the IPCC Fifth Assessment (AR5) are the default values for this tool and the GWPs for the IPCC Sixth Assessment (AR6) are included here for comparative purposes only.

3.	Select the KCA Threshold you will use for the Approach 1 Assessment. Developing countries have the flexibility to identify key categories using a threshold of 85% to 95%. Countries without
this flexibility must select 95%.

4.	Select the 2006 or 2019 equation you will use for the trend assessment. If activity was not occurring in Base Year (i.e., emissions and removals are zero in that year), you can instead use the
emissions/removals value from the first year when the activity started as the Base Year. If using the IPCC Equation 4.2 (2006) for the trend analysis and activity for a category was not occurring
in the Base Year, the trend assessment is the same as the level assessment. See each equation below the key parameters table for more information.

5.	Once the Base and Current Years are entered and the Global Warming Potentials and KCA Threshold are selected, the 'Status Tracker' for this tab will turn green, allowing you to click "Begin
Data Entry" to proceed to the first data entry tab.

Key Category Analysis Year

Enter Base Year

2022

Enter Current Year

2024

Global Warming Potentials (GWPs)

Select 'IPCC AR5 (Fifth Assessment)' or 'IPCC AR6 (Sixth Assessment
Report)' from drop-down menu below:

IPCC AR5 (Fifth Assessment)

|l Cover | Contents General Information

KCA Parameters

KCA Threshold

Select a threshold

from the drop-
down menu below:

Trend Equation

Select the 2019 or 2006
trend assessment equation
from the drop-down menu
below:

Equation 4.2 (IPCC 2019)

Status Tracker

Begin Data
Entry

Step 2: Enter Emissions and Removals Data and Uncertainty Values

Enter emissions and/or removals data for categories
within each sector in each of the seven DARK BLUE
KCA Input - Sector data input tabs (see the
flowchart in Figure 2 for a list of all DARK BLUE KCA
Input - Sector data input tabs).

Optionally, users may enter any uncertainty values
into the data input tabs.

Note the IPPU Sector is separated into two tabs -
one for mostly non-fluorinated gases from this
sector (2a. KCA Input-IPPU) and one specifically
for fluorinated gas source categories (F-gases) (2b.
KCA Input-IPPU F-gas).

Note on Tool Navigation

Use the 'Status Tracker' above the input table
to track the number of categories that still
require data entry. A clickable 'Next' button
will appear once data are entered in all
required fields. Note that on the DARK BLUE
KCA Input -Other tab does not have a Status
Tracker as all entries on this input tab are
optional.

Status Tracker

Number of Categories Requiring Data Entry

0

Proceed to 2a. KCA Input - IPPU

Next

Required data entry cells are shaded in
The uncertainty value cells are shaded in ©MMO®
found in the 'Uncertainty Values' section below.

More information regarding uncertainty can be

Emissions and Removals Data Entry

For each category, enter the emissions and/or removals data in kilotons (kt) into the 'Base Year
Estimates (kt)' and 'Current Year Estimates (kt)' columns in the DARK BLUE KCA Input - Sector data input
tabs. Dependent on the data disaggregation, emissions and/or removals data can be entered in the
bolded category rows (i.e., Fuel Combustion - Energy Industries) or a subcategory row (i.e., Fuel
combustion - Energy Industries - Liquid Fuels).

15


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December 2024

Notation Keys and Definitions

NO (Not Occurring) - For categories or processes,
including recovery, under a particular source or
sink category that do not occur within a Party.

NE (Not Estimated) - For activity data and/or
emissions by sources and removals by sinks of
GHGs that have not been estimated but for which
a corresponding activity may occur within a Party.

NA (Not Applicable) - For activities under a given
source/sink category that do occur within the
Party but do not result in emissions or removals of
a specific gas.

IE (Included Elsewhere) - For emissions by
sources and removals by sinks of GHGs estimated
but included elsewhere in the inventory instead of
under the expected source/sink category.

C (Confidential) - For emissions by sources and
removals by sinks of GHGs where the reporting
would involve the disclosure of confidential
information.

If you have disaggregated data available to use
in a subcategory row, please select "See
Disaggregated" from the dropdown menu
(shown in Figure 5) for the higher category row
in the 'Base Year Estimates (kt)' and/or 'Current
Year Estimates (kt)' columns. Then enter the
disaggregated data in the 'Base Year Estimates
(kt)' and/or 'Current Year Estimates (kt)'
columns in the subcategory rows below. If you
start an entry with aggregated data and realize
later that you have disaggregated data you
would like to use in a subcategory row, please
be sure to change the aggregated row to "See
Disaggregated" from the dropdown menu to
not double count data values.

Emissions entered in these columns will
automatically convert to kt C02e in the 'Base
Year Estimates (kt C02e)' and 'Current Year
Estimates (kt C02e)' columns using 100-year
GWPs from the IPCC Assessment Report version
selected in the KCA Parameters tab.7 Note the
MPGs require use of the 100-year GWPs from
IPCC AR5 beginning in 2024 with the first BTR.

Figure 5. KCA Tool "1. KCA Input - Energy" Tab Showing "See Disaggregated" Dropdown Menu



Energy Sector 1



CRT Code |V|

Category Title |V|

Greenhouse Gj

r

Base Year



Current Year
Estimates (kt) ~



Entry Required

1-A.i

Fuel Combustion - Energy Industries

C02

r



3





Entry Required

1A.1

Fuel Combustion - Energy Industries

ch4



See Disaggregated







Entry Required

1A.1

Fuel Combustion - Energy Industries

n2o

E



¦9





Entry Required

1A1

Fuel combustion - Energy Industries - Liquid Fuels

co2







Entry Required

1A1

Fuel combustion - Energy Industries - Liquid Fuels

ch4







Entry Required

1A1

Fuel combustion - Energy Industries - Liquid Fuels

n2o







Entry Required

1A1

Fuel combustion - Energy Industries - Solid Fuels

co2







Entry Required

1-A.l

Fuel combustion - Energy Industries - Solid Fuels

ch4





_

>	Cover Contents General Information Instructions |	| 1. KCA Input - Energy j	J ¦¦¦ + 4

7 These GWP values come either from Table 8.A.1 in the Fifth IPCC Assessment Report (AR5) or Table 7.SM.7 from
the Sixth IPCC Assessment Report (AR6), as indicated on the GWP tab.

16


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December 2024

If emissions or removals are not reported for a category, enter one of the five notation keys into the
'Base Year Estimates (kt)' and/or 'Current Year Estimates (kt)' columns. Within the KCA tool, the
definitions of the five notation keys are located in a table on the	iformatioi tab.

If a category does not have either emissions and/or removals reported or a notation key entered in the
'Base Year Estimates (kt)' and/or 'Current Year Estimates (kt)' columns, an 'Entry Required' alert will be
shown in the first column. Once data and/or a notation key are entered, the 'Entry Required' alert will
be removed.

Note that some rows in the 2b. KCA Input - IPPU F-gas and 3. KCA Input - Agriculture tabs indicate
'Entry Optional' in the first column. Entry for these rows is not required to complete the KCA.

For example, in Figure 6 the row for 1.A.1 Fuel Combustion - Energy Industries - Solid Fuels N20 is left
blank and the 'Entry Required' alert is showing to the left. Once emissions are entered for the row 1.A.1
Fuel Combustion - Energy Industries - Solid Fuels N20, the 'Entry Required' alert will be removed from the
first column.

Figure 6. KCA Tool "1. KCA Input - Energy" Tab Showing Where Data Entry is Required



Energy Sector











Base Year





Greenhouse

Base Year

Current Year

Estimates



CRT Code ' Category Title [V]

Gas TJ

Estimates (kt) [T|

Estimates (kt)

(kt C02e) p]



l.A.l Fuel Combustion - Energy Industries

co2

r See Disaggregated

See Disaggregated
See Disaggregated

See Disaggregated
See Disaggregated
See Disaggregated

l.A.l Fuel Combustion - Energy Industries

ch4

See Disaggregated

l.A.l Fuel Combustion - Energy Industries

n2o

See Disaggregated

See Disaggregated

l.A.l Fuel combustion - Energy Industries - Liquid Fuels

COj
CH4

n2o

IE
202.0

50.0
15.0

IE
5,656.0

Entry Required

	 l.A.l Fuel combustion - Energy Industries - Liquid Fuels

l.A.l\Fuel combustion - Energy Industries - Liquid Fuels



uonienis ueneral Intormaiion Instructions nput - Enerqy ^

| 2b. KCA Input - IPPU F-gas | 3. KCA if

• © <

Uncertainty Values

If uncertainty values for a category are available, enter the uncertainty data (in % values - e.g., enter 5
for 5%, not 0.05) in the 'Activity Data Uncertainty' and 'Emission Factor Uncertainty' columns in the
DARK BLUE KCA Input - Sector data input tabs. Country-specific values or default values from the 2006
IPCC Guidelines can be used. Under the MPGs, all countries shall perform an uncertainty analysis. Those
developing country Parties that need flexibility in the light of their capacities with respect to this
provision have the flexibility to instead provide, at a minimum, a qualitative discussion of uncertainty for
key categories. Applying additional guidance from the 2019 Refinement, if the uncertainty values are
asymmetrical (e.g., -10% lower bound, +20% upper bound), the larger uncertainty value should be used
(e.g., ±20%)8.

If users instead have standalone combined uncertainty values representing both uncertainty in the
activity data and the emissions factor - for example, those derived from expert judgement or based on
direct emissions estimates - users should instead enter this value in the 'Combined Uncertainty' column.
If users enter data into the 'Activity Data Uncertainty' and 'Emission Factor Uncertainty' columns, the
'Combined Uncertainty' column will turn grey with a Crosshatch pattern to prevent multiple uncertainty
value entries for a single category.

8 https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/l_Volumel/19R_Vl_Ch03_Uncertainties.pdf

17


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December 2024

If no uncertainty value is available for a category, please leave the uncertainty value cells blank. The
Approach 1 key category assessment is completed without incorporating information on uncertainty. If
no categories have an uncertainty value, the Approach 2 assessments will be left blank. If some
categories have uncertainty values while other categories do not, only the categories that do include
uncertainty values will contribute to the Approach 2 'Level Assessment with Uncertainty' and 'Relative
Level Assessment with Uncertainty' columns on the I. Approach 2 Level and Tren<, 8a. Approach 2 KCA
LULUCF, and 8b. Approach 2 KCA No LULUCF tabs. While not required under the ETF, users are
encouraged to perform and report on Approach 2 analyses where possible.

Figure 7 provides an example with values entered in the 'Combined Uncertainty' column for certain
categories. For these rows, the 'Activity Data Uncertainty' and 'Emission Factor Uncertainty' columns
have a grey Crosshatch pattern. Similarly, where the 'Activity Data Uncertainty' and 'Emission Factor
Uncertainty' columns have values entered for other categories, the 'Combined Uncertainty' column for
those categories has the grey Crosshatch pattern. Additionally, there are several categories that do not
have uncertainty values provided and are left blank.

Figure 7. KCA Tool "1. KCA Input - Energy" Tab Showing Uncertainty Values

1 Energy Sector









Base Year

Current Year







Greenhouse

Base Year

Current Year

Estimates

Estimates Activity Data

Emission Factor

Combined

CRT Code Category Title

Gas

Estimates (kt)

Estimates (kt)

(kt C02e)

(kt C02e) Uncertainty

Uncertainty

Uncertainty

l.A.l Fuel Combustion - Energy Industries

C02

See Disaggregated

See Disaggregated

See Disaggregated

See Disaggregated





l.A.l Fuel Combustion - Energy Industries

CH„

See Disaggregated

See Disaggregated

See Disaggregated

See Disaggregated	





l.A.l Fuel Combustion - Energy Industries

l.A.l Fuel combustion - Energy Industries - Liquid Fuels

n2o

co2

r See Disaggregated
IE

See Disaggregated
50.0

See Disaggregated
	IE

See Disaggregated





50.0





l.A.l Fuel combustion - Energy Industries - Liquid Fuels
l.A.l 1 Fuel combustion - Energy Industries - Liquid Fuels

ch4
n2o

202.0
75.0

15.0
NA
NA

C
54.0

5,656.0
19,875.0
45.0
C

3,180.0

420.0 pilllllllllllllM

NA 10%



5%

l.A.l Fuel combustion - Energy Industries - Solid Fuels
l.A.l Fuel combustion - Energy Industries - Solid Fuels

ch4

C
12.0





l.A.l Fuel combustion - Energy Industries - Solid Fuels
l.A.l Fuel combustion - Energy Industries - Gaseous

n2o

co2

14,310.0 1 7%

















« ^¦



< > Cover Contents General Information Instructions 1- KCA Input - Energy |

a. KCA Input - IPPU |



Step 3: Review Approach 1 and Approach 2 Emissions and Removals

Once data are entered in all seven DARK BLUE KCA Input - Sector data input tabs, summary tables are
provided in the >LUI tabs. Review Approach 1 and 2 level emissions in the 7. Approach 1 Level and
Trend and I. Approach 2 Level and Trent tabs. Emissions and/or removal data entered in the DARK
BLUE KCA Input - Sector data input tabs populate these summary tabs. Each tab has two tables: Table 7-
1, which summarizes the Approach Level and Trend Analysis including Land Use, Land-Use Change and
Forestry (LULUCF), and Table 7-2, which summarizes the Approach Level and Trend Analysis excluding
LULUCF. Make sure to scroll to the right in each tab to see the full tables.

The 7. Approach 1 Level and Trend tab provides the level assessments for the Base Year and Current
Year, as well as the trend assessment value. Table 7-1 in this tab summarizes Approach 1 Level and
Trend Analysis including LULUCF. For example, in Figure 8, the LULUCF categories (beginning with CRT
Code 4, shown outlined in the red box) are included in Table 7-1 in the tool.

18


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December 2024

Figure 8. KCA Tool "7. Approach 1 Level and Trend" Tab Showing Table 7-1, Which Includes LULUCF Categories

Table 7-1. Approach 1 Level (Ll-LULUCF) and Trend Analy

CRT Code

Category Title

Greenhouse Gas

Total

1.A.1

Fuel combustion - Energy Industries - Liquid Fuels

CO 2

1.A.1

Fuel combustion - Energy industries - Liquid Fuels

CH4

1.A.1

Fuel combustion - Energy industries - Liquid Fuels

N20

1.A.1

Fuel combustion - Energy industries - Solid Fuels

002

1.A.1

Fuel combustion - Energy industries - Solid Fuels

N20

1.A.1

Fuel combustion - Energy industries - Peat

CO 2

1.A.2

Fuel combustion • Manufacturing industries and Construction

C02

LA. 2

Fuel combustion - Manufacturing industries and Construction

CH4

LA. 2

Fuel combustion - Manufacturing Industries and Construction

N20

2.A.1

Cement Production

CO 2

2.A.2

urne Production

CO 2

2.B.2

Nitric Acid Production

N20

2.B.9

Ruorochemical Production

Aggregate F-gases

2.C.1

iron and Steel Production

C02

2.C. 1

iron and Steel Production

CH4

2.C.2

Ferroalloys Production

C02

2.F.1

Refrigeration and Air condrtionmg

CO 2

3ALa.il

Non-dairy Cattle

CW4

|3.A3

Swine

CH4

4. A. La

Forest land remaining forest land - biomass (above and below)

C02

4.A.Ld

Forest land remaining forest land-soil (organic)

C02

4. KCA Input - LULUCF I 5. KCA Input - Waste I 6. KCA Input - Other

7. Approach 1 Level and Trend

Table 7-2 in the 7. Approach 1 Level and Trend tab summarizes Approach 1 Level arid Trend Analysis
excluding LULUCF. In Figure 9 the LULUCF categories (beginning with CRT Code 4) are removed from
Table 7-2 in the tool. The red boxes in Figures 8 and 9 show how the inclusion/exclusion of LULUCF
categories can influence the key categories.

Figure 9. KCA Tool "7. Approach 1 Level and Trend" Tab Showing Table 7-2, Which Excludes LULUCF Categories

Table 7-2.

App

roach 1 Level (LI) and Trend Anal

Y*

CRT Code

Category Title

Greenhouse Gas

Total



1.A.1

Fuel combustion - Energy industries - Liquid Fuels

C02



1.A.1

Fuel combustion - Energy Industries - Liquid Fuels

CH4



1.A.1

Fuel combustion - Energy Industries - Liquid Fuels

N20



1.A1

Fuel combustion - Energy industries - Solid Fuels

C02



1.A.1

Fuel combustion - Energy Industries - Solid Fuels

N20



1.A1

Fuel combustion - Energy industries - Peat

C02



1.A.2

Fuel combustion - Manufacturing industries and Construction

C02



1.A.2

Fuel combustion - Manufacturing industries and Construction

CH4



1.A.2

Fuel combustion - Manufacturing Industries and Construction

N20



2.A.1

Cement Production

C02



2.A.2

Lime Production

C02



2.B.2

Nitric Acid Production

N20



2.B.9

Fluorochemical Production

Aggregate F-gases



2.C.1

Iron and Steel Production

C02



2.C.1

iron and Steel Production

CH4



2.C.2

Ferroalloys Production

C02



2.F.1

Refrigeration and Air conditioning

C02



3.Al.a.ii

Non-dairy Cattle

CH4



3.A3

Swine

CH4

1

5.A

Solid Waste Disposal - Municipal Solid Waste Disposal

CH4



5.A

Solid Waste Disposal - Industrial Solid Waste Disposal

CH4

4. KCA Input - LULUCF I 5. KCA Input - Waste I 6. KCA Input - Other

7. Approach 1 Level and Trent

19


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December 2024

If uncertainty values are provided in the DARK BLUE KCA Input - Sector data input tabs, the 8. Approach
2 Level and Trend tab (Figure 10) will provide the percentage of uncertainty in the total inventory as
well as the trend uncertainty value. In the tables on the 8. Approach 2 Level and Trend tab, the 'Activity
Data Uncertainty', 'Emission Factor Uncertainty', and 'Combined Uncertainty' cells are automatically
filled with information based on what was entered in the DARK BLUE KCA Input - Sector data input tabs.
The 'Total Uncertainty' column streamlines these three uncertainty columns, so all uncertainty data are
in one column. The 8a. Approach 2 KCA LULUCF and 8b. Approach 2 KCA No LULUCF tab only shows the
'Total Uncertainty' column.

Figure 10. KCA Tool "8. Approach 2 Level and Trend" Tab, Showing Uncertainty Values in Table 8-1

2-LULUCF) and Trend Analysis (T2-LULUCF) Including LULUCF



Level
Assessment
(2018)

Level
Assessment
(2020)

Activity
Data
Uncertainty

%

Emission
Factor
Uncertainty

%

Combined
Uncertainty

%

Total
Uncertainty

%

Level
Assessment
(2018) with
Uncertainty

Level
Assessment
(2020) with
Uncertainty

Trend
Assessment
Value

Trend
Assessment

with
Uncertainty

Contribution to
the Trend



1.000

1.001

1	

0.042

0.038

3.154

0.096

1.000



0.106

0.06

10%

0%

0%

10%

0.011

0.006

0.289

0.02S

0.303



0.000

0.08

0%

0%

5%

5%

0.000

0.004

0.784

0.03?

0.410



0.000

0.07

0%

0%

0%

0%

0.000

0.000

0.645

0.0CX

iia



0.153

0.14

0%

15%

0%

15%

0.023

0.022

0.093

0.01'

0.146



0.106

0.04

0%

0%

0%

0%

0.000

0.000

0.444

O.OOC

0.000



0.153

0.14

0%

0%

0%

0%

0.000

0.000

0.075

0.00(

0.000



0.015

0.01

0%

0%

0%

0%

0.000

0.000

0.046

o.ooc

0.000



0.036

0.03

0%

0%

4%

4%

0.001

0.001

0.042

0.00 2

0.017



0.000

0.02

0%

0%

0%

0%

0.000

0.000

0.235

o.ooc

	 0.000



0.067
0.001

0.04

0.00

10%

0%

0%

0%

0%

0%

10%

0%

0.007
0.000

0.005
0.000

0.118

0.010

om

O.OOC

0.124

0.000



0.057

0.05

0%

0%

0%

0%

0.000

0.000

0.065

O.OOC

0.000



0.179

0.14

0%

0%

0%

0%

0.000

0.000

0.112

O.OOC

0.000



0.035

0.02

0%

0%

0%

0%

0.000

0.000

0.037

O.OOC

0.000



0.092

0.09

0%

0%

0%

0%

0.000

0.000

0.157

O.OOC

0.000



griculture |

4. KCA Input •

LULUCF | 5. KCA Input

- Waste | 6. KCA Input

¦ Other | 7. Approach 1 Level and Trend

Approach 2 Lei

/el and Trend |

Methodology & Equations for Approach 1 Level and Trend

The Base Year Level Assessment and Current Year Level Assessment are calculated by dividing the
absolute value of the emissions or removals for a category by the overall emissions or removals for a
given assessment year.

The Trend Assessment Value is calculated using the equation selected by users in the KCA Parameters
tab. Users can select either the equation from the 2019 Refinement (Figure 11) or the 2006 IPCC
Guidelines (Figure 12). If activity was not occurring in the Base Year, then emissions and removals are
zero in that year. If countries use the Trend Assessment Equation from the 2019 Refinement, they
should indicate use of the Trend Assessment Equation and why it is more appropriate for their national
circumstances, which includes using the latest guidance to better capture the influence of categories on
the overall inventory trend.

20


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December 2024

Refinement - Equation 4.2 Trend Assessment (Approach 1)

Where:

Tx - trend assessment of source or sink category x in year t as compared to the base year (year 0)

Ex 0 and Ex t	= value of emission or removal estimate of source or sink category x in year 0 and

year t

V £ f and V Ej(j ~ total inventory estimates in years t and 0, respectively
for i = 1,n

Users have the option of using equation 4.2 in Chapter 4 of the 2006 IPCC Guidelines, as shown in Figure
12. If activity was not occurring in the Base Year (i.e., emissions and removals are zero in that year),
users can instead select the 2006 equation, which will use the emissions/removals value from the first
year when the activity started as the Base Year.

Figure 12. 2006 IPCC Guidelines - Equation 4.2 Trend Assessment (Approach 1)

Where:

Tx,t = trend assessment of source or sink category x in year t as compared to the base year (year 0)
I Ex,ol = absolute value of emission or removal estimate of source or sink category x in year 0
Ex t and Ex 0 = real values of estimates of source or sink category x in years t and 0, respectively

Yj Ey t and X Ey,o = total inventory estimates in years t and 0, respectively

y	y

Methodology & Equations for Approach 2 Level and Trend

The Trend Assessment with Uncertainty is calculated by multiplying the Trend Assessment Value by the
Total Uncertainty.9 The tool calculates the contribution to the trend by dividing the Trend Assessment
with Uncertainty for a category by the overall Trend Assessment with Uncertainty.

Step 4: Review Approach 1 and Approach 2 Level and Trend Assessments

In tabs 'a. Approach 1 KCA LULUCF and 7b. Approach 1 KCA No LULUCI, key categories are summarized
for Approach 1 Level and Trend assessments. For an Approach 1 assessment, key categories are those
that add up to 95 percent when summed together, as defined in the 2006 IPCC Guidelines. The ETF
offers developing countries the flexibility to identify key categories using a threshold between 85-95
percent.10 Note that the final list of key categories may change based on the selected threshold.

Key categories are shaded in GREEN based on the threshold selected in the KCA Parameters tab. When
a lower threshold is used, additional categories up to the 95 percent threshold are shaded in

. Key categories are shown sorted largest to smallest. Due to rounding, some categories listed with
95 percent may not be shaded light blue and therefore are not considered key. Note that the cumulative
total shown in the shaded cells may exceed the threshold value selected if the previous, second largest
category's cumulative total does not meet or exceed the threshold value. For example, if a user elects to
use an 85 percent threshold, the sum of the categories that get the user to the 85 percent threshold are

9	See 2006 IPCC Guidelines, Volume 1, Chapter 4, Equation 4.5

10	Under the MPGs, countries that apply this flexibility are required to clarify capacity constraints to using the
higher threshold in their KCA and provide a self-determined estimated timeframe for improvements in relation to
those constraints.

Figure 11. 2019

Eqlation 4.2 (Updated)
Trend assessment (Approach 1)

K,

-£.o

IX

-2Xo

i

Equation 4.2
Trend Assessment (Approach 1)

T

Ko|

£ \Ey.01

|£j

r	

I£..o

y

21


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December 2024

key and shaded in GREEN. If the cumulative total for one category were to only reach 80 percent, the
next category will be shaded in 3REET even if the cumulative total value is above 85 percent.

Approach 1 Level and Trend Assessments

The 7a. Approach 1 KCA LULUCF tab includes the LULUCF sector. Table 7a-l identifies key categories for
the Base Year, Table 7a-2 identifies key categories for the Current Year, and Table 7a-3 summarizes key
categories from the trend assessment. Figure 13 shows an example of Tables 7a-l through 7a-3 with an
85 percent threshold.

The 7b. Approach 1 KCA No LULUCF tab excludes the LULUCF sector. This exclusion provides required
information on the level and trend assessment, without the influence of emissions and removals from
the LULUCF sector, and can be compared to findings including LULUCF provided in Tables 7a-l through
7a-3. Table 7b-l identifies key categories for the Base Year, Table 7b-2 identifies key categories for the
Current Year, and Table 7b-3 summarizes key categories from the trend assessment. See the example in
Figure 14. Consistent with the example above with 7a. Approach 1 KCA LULUCI tab (Figure 13), an 85
percent threshold is used, the key categories are shaded in SREEN for the 85 percent threshold, and
additional categories are shaded	up to the 95 percent threshold. Note that all LULUCF

categories (beginning with CRT Code 4) are removed from these tables and the key categories differ
from Tables 7b-l through 7b-3 in the 7a. Approach 1 KCA LULUCI tab.

22


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December 2024

Figure 13. KCA Tool "7a. Approach 1 KCA LULUCF" Tab









Approach 1

- Level Assessment

Table 7a-l. Base Year (2022)

















Rank of













Base Year







Base Year

Level

Cumulative

Value

CRT Code

Category Title

Greenhouse Gas

Estimates

Assessment

Total

Estimate







kt C02e







Total

291,343

1.000





2.C.3

Aluminium Production

Aggregate F-gases

198,900.0

0.683

68.3%

l

3.A

Enteric Fermentation

CH4

28,000.0

0.096

77.9%

2

3.B

Manure Management

CH4

14,000.0

0.048

82.7%

3

5.A

Solid Waste Disposal

CH4

14,000.0

0.048

87.5%

4

1.A.2

Fuel combustion - Manufacturing Industries and Construction

CH4

11,200.0

0.038

91.3%

5

2.B.9

Fluorochemical Production

Aggregate F-gases

7,800.0

0.027

94.0%

6

1.A.1

Fuel Combustion - Energy Industries

N20

3,975.0

0.014

95.4%

7

2.B

Chemical Industry

CH4

3,360.0

0.012



8

1.A.1

Fuel Combustion - Energy Industries

CH4

2,520.0

0.009

97.4%

9

1.A.3

Transport

CH4

1,400.0

0.005

97.9%

10

Table 7a-2. Current Year (2024)

















Rank of













Current







Current Year

Level

Cumulative

Year Value

CRT Code

Category Title

Greenhouse Gas

Estimates

Assessment

Total

Estimate







kt co2e







Total

227,396

1.000





2.C.3

Aluminium Production

Aggregate F-gases

145,860.0

0.641

64.1%

l

3.A

Enteric Fermentation

CH4

22,400.0

0.099

74.0%

2

3.B

Manure Management

CH4

13,720.0

0.060

80.0%

3

5.A

Solid Waste Disposal

CH4

12,600.0

0.055

85.6%

4

2.B.9

Fluorochemical Production

Aggregate F-gases

9,100.0

0.040

89.6%

5

1.A.2

Fuel combustion - Manufacturing Industries and Construction

CH4

8,400.0

0.037

93.3%

6

1.A.1

Fuel Combustion - Energy Industries

N20

3,710.0

0.016

94.9%

7

2.B

Chemical Industry

CH4

2,800.0

0.012

96.1%

8

1.A.1

Fuel Combustion - Energy Industries

CH4

2,240.0

0.010



9

1.A.3

Transport

CH4

1,120.0

0.005

97.6%

10

Approach 1 - Trend Assessment

Table 7a-3. Trend Assessment







Base Year

Current Year





Rank of







Estimates

Estimates

Contribution

Cumulative

Trend

CRT Code

Category Title

Greenhouse Gas

(2022)

(2024)

to the Trend

Total

Estimate







kt C02e

kt C02e







Total

291,343

227,396

1.000





2.C3

Aluminium Production

Aggregate F-gases

198,900.0

145,860.0

80%

79.6%

1

3.A

Enteric Fermentation

CH4

28,000.0

22,400.0

8%

88.0%

2

1.A.2

Fuel combustion - Manufacturing Industries and Construction

CH4

11,200.0

8,400.0

4%

92.2%

3

5.A

Solid Waste Disposal

CH4

14,000.0

12,600.0

2%

94.3%

4

2.B.9

Fluorochemical Production

Aggregate F-gases

7,800.0

9,100.0

2%

96.2%

5

2.B

Chemical Industry

CH4

3,360.0

2,800.0

1%



6

1.A.1

Fuel Combustion - Energy Industries

CH4

2,520.0

2,240.0

0%

97.5%

7

1.A.3

Transport

CH4

1,400.0

1,120.0

0%

97.9%

8

23


-------
December 2024

Figure 14. KCA Tool "7b, Approach 1 KCA No LULUCF" Tab

Approach 1 - Level Assessment

Table 7b-l. Base Year (2022)

Category Title

Greenhouse
Gas

Base Year
Estimates

ktC02e

Level
Assessmen

Cumulative
Total

Rank of
Base Year

Value
Estimate

290,693

1.00

1.A.2

2.B.9

1.A.1

2.B
l.A.l
1.A.3

Aluminium Production
Enteric Fermentation
Manure Management
Solid Waste Disposal

Fuel combustion - Manufacturing Industries and Construction

Fluorochemical Production

Fuel Combustion - Energy Industries

Chemical Industry

Fuel Combustion - Energy Industries

Transport

Rice Cultivation

Fuel Combustion - Energy Industries
Other

Prescribed burning of savannas
Metal Production

6. KCA Input - Other I 7. Approach 1 Level and Trend I 7a. Approach 1 KCA LULUCF

Aggregate F-gases
CH4
CH4
CH4
CH4

Aggregate F-gases
N20

CH4
CH4
CH4
CH4
C02
C02
CH4
C02

198,900.0
28,000.0
14,000.0
14,000.0

11,200.0
7,800.0
3,975.0
3,360.0
2,520.0
1,400.0
1,400.0
1,000.0
700.0
504.0
500.0

0.6S
0.0?
0.CV
0.0^
0.0-

o.o:

o.o:

0.009
0.005
0.005
0.003
0.002
0.002
0.002

68.4%
78.1%
82.9%
87.7%
91.5%
94.2%
95.6%

97.6%
98.1%
98.6%
98.9%
99.2%
99.3%
99.5%

7b. Approach 1 KCA No LULUCF

8. Approach 2 Level and Trend I 8a. Approach 2 KCA LULUCF

Table 7b-2. Current Year (2024)

Category Title

Greenhouse Gas

Current Year
Estimates

ktC02e

Level
Assessmen

Cumulative
Total

Rank of
Current
Year Value
Estimate

226,847

2.B.9
1.A.2

1.A.l

2.B
l.A.l
1.A.3

Aluminium Production
Enteric Fermentation
Manure Management
Solid Waste Disposal
Fluorochemical Production

Fuel combustion - Manufacturing Industries and Construction

Fuel Combustion - Energy Industries

Chemical Industry

Fuel Combustion - Energy industries

Transport

Rice Cultivation

Fuel Combustion - Energy industries
Other

Prescribed burning of savannas
Metal Production

7. Approach 1 Level and Trend I 7a. Approach 1 KCA LULUCF

Aggregate F-gases
CH4
CH4
CH4

Aggregate F-gases
CH4
N20
CH4
CH4
CH4
CH4
C02
C02
CH4
C02

145,860.0
22,400.0
13,720.0
12,600.0
9,100.0
8,400.0
3,710.0
2,800.0
2,240.0
1,120.0
1,120.0
800.0
600.0
560.0
500.0

0.6^
0.0?
0.0 f

0.0-

0.01

0.01

0.010

0.005

0.005

0.004

0.003

0.002

0.002

64.3%
74.2%
80.2%
85.8%
89.8%
93.5%
95.1%

7b. Approach 1 KCA No LULUCF

8. Approach 2 Level and Trend I 8a. Approach 2 KCA LULUCF

97.3%
97.8%
98.3%
98.7%
99.0%
99.2%
99.4%
... +

Approach 1 - Trend Assessment

Table 7b-3. Trend Assessment

Greenhouse Gas

Base Year
Estimates
(2022)

kt C02e

Current Year
Estimates Contributioi
(2024) totheTrenc

ktC02e	

Cumulative
Total

Rank of
Trend
Estimate

290,693

226,847

1M

Aluminium Production
Enteric Fermentation

!	Fuel combustion - Manufacturing Industries and Construction

Solid Waste Disposal
i	Fluorochemical Production

Chemical Industry
l.A.l	Fuel Combustion - Energy Industries

1.A.3	Transport

Manure Management
Rice Cultivation
l.A.l	Fuel Combustion - Energy Industries

1.A.1	Fuel Combustion - Energy Industries

Other

Prescribed burning of savannas
Incineration and Open Burning of Waste

7. Approach 1 Level and Trend I 7a. Approach 1 KCA LULUCF

7b. Approach 1 KCA No LULUCF

198,900.0
28,000.0
11,200.0
14,000.0
7,800.0
3,360.0
2,520.0
1,400.0
14,000.0
1,400.0
3,975.0
1,000.0
700.0
504.0
420.0

8. Approach 2 Level and Trend I 8a. Approach 2 KCA LULUCF

Aggregate F-gases
CH4

CH4
CH4

Aggregate F-gases
CH4
CH4
CH4
CH4
CH4
N20
C02

145860.000
22400.000
8400.000
12600.000
9100.000
2800.000
2240.000
1120.000
13720.000
1120.000
3710.000
800.000
600.000
560.000
364.000

79.7%
88.1%
92.3%
94.4%
96.4%

97.6%
98.0%
98.5%
98.9%
99.3%
99.6%
99.7%
99.8%
99.9%

Approach 2 Level and Trend Assessments

In the 8a. Approach 2 KCA LULUCF and 8b. Approach 2 KCA No LULUCF tabs, key categories are
summarized for Approach 2 Level and Trend assessments. Key categories are shaded in	up

to the 90 percent threshold. Per the 2006 IPCC Guidelines, for an Approach 2 level assessment, "the key
categories are those that add up to 90 percent" when summed together. These key categories are
sorted from largest to smallest. Due to rounding, some categories listed with 90 percent may not be

24


-------
December 2024

shaded	and therefore are not considered key. The 8a. Approach 2 KCA LULUCF tab includes

the LULUCF sector. Table 8a-l identifies key categories for the Base Year, Table 8a-2 identifies key
categories for the Current Year, and Table 8a-3 summarizes key categories from the trend assessment.
See the example in Figure 15.

Figure 15. KCA Tool "8a. Approach 2 KCA LULUCF" Tab

Approach 2 - Level Ass<

Table 8a-l. Base Year (2022)

Base Year Estimates (kt C02e)

Level Assessment

Total Combined Uncertainty

Level Assessment with
Uncertainty

Relative Level Assessment with
Uncertainty

Cumulative Total

647,084

1.000



0.003

1.000



26,500.0

0.041

0.040

0.002

0.545

54*

5,656.0

0.009

0.050

0.000

0.145

69*

3,180.0

0.005

0.081

0.000

0.132

82*

4,228.0

0.007

0.050

0.000

0.109

93*

2,800.0

0.004

0.030

0.000

0.043



2,222.0

0.003

0.020

0.000

0.023

100%

45.0

0.000

0.100

0.000

0.002

100%

100.0

0.000

0.020

0.000

0.001

100%

IE

0.000

0.000

0.000

0.000

100%

19,875.0

0.031

0.000

0.000

0.000

100%

55,594.0

0.086

0.000

0.000

0.000

100%

42,515.0

0.066

0.000

0.000

0.000

100%

1,515.0

0.002

0.000

0.000

0.000

100%

66,780.0

0.103

0.000

0.000

o.ooo

100%

67,280.0

0.104

0.000

0.000

0.000

100%

NA

0.000

0.000

0.000

0.000

100%

420.0

0.001

0.000

0.000

0.000

100%

2.0

	 0.000

0.000

	_ 0.000

	0.000

	100%

7a. Approach 1 KCA LULUCF | 7b. Approach 1 KCA No LULUCF | 8. Approach 2 Level and Trend

8a. Approach 2 KCA LULUCF

8b. Approach 2 KCA No LULUCI

©

Current Year Estimates (kt C02e)

Level Assessment

Total Combined Uncertainty

Level Assessment with Uncertainty

Relative Level Assessment with Uncertainty

Cumulative Total

420,295

1.000



0.007

1.000



14,310.0

0.034

0.081

0.003

0.399

40%

55,456.0

0.132

0.020

0.003

0.384

78%

13,250.0

0.032

0.040

0.001

0.183

97%

1,400.0

0.003

0.030

0.000

0.015



700.0

0.002

0.050

0.000

0.012

99%

420.0

0.001

0.050

0.000

0.007

100%

50.0

0.000

0.020

0.000

0.000

100%

50.0

0.000

0.000

0.000

0.000

100%

na

0.000

0.000

0.000

0.000

100%

NA

0.000

0.100

0.000

0.000

100%

51,515.0

0.123

0.000

0.000

0.000

100%

78,881.0

0.188

0.000

0.000

0.000

100%

NA

0.000

0.000

0.000

0.000

100%

35,510.0

0.084

0.000

0.000

0.000

100%

61,800.0

0.147

0.000

0.000

0.000

100%

45.0

0.000

0.000

0.000

0.000

100%

3,444.0

0.008

0.000

0.000

0.000

100%

1.0

	aooo

	0.000

0.000

	0.000

	 100%

7a. Approach 1 KCA LULUCF B 7b. Approach 1 KCA No LULUCF fl 8. Approach 2 Level and Trend

8a. Approach 2 KCA LULUCF

8b. Approach 2 KCA No LULUCI

©

Table 8a-3. Trend Assessment

Base Year Estimates (2020)

Current Year Estimates (2022)

Combined Uncertainty

Trend Assessment with Uncertainty

Relative Level Assessment with Uncertainty

Cumulative Total

647,084

420,295

1.000

1.00<

2,222.0
3,180.0
26,500.0
5,656.0
4,228.0
2,800.0
45.0
100.0
IE

19,875.0
55,594.0
42,515.0
1,515.0
66,780.0
67,280.0
NA

55,456.000
14,310.000
13,250.000
420.000
700.000
1.400.000
NA
50.000
50.000

51,515.000
78.881.000
NA

35,510.000
61,800.000
45.000
3,444.000
1.000

0.020
0.081
0.040
0.050

0.050
0.030
0.100
0.020
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000

7a. Approach 1 KCA LULUCF I 7b. Approach 1 KCA No LULUCF I 8. Approach 2 Level and Trend

0.358
0.301
0.178
0.088
0.059
0-014
0.002
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000

8a. Approach 2 KCA LULUCF

0.35
0.30
0.17
0.08
0.05
0.014
0.002
0.000
0.000
0.000
0.000
0.000
0.000

o.ooo

0.000
0.000
0.000
0.000

36%
66%
84%
92%

8b. Approach 2 KCA No LULUC

... ©

100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%

25


-------
December 2024

The 8b. Approach 2 KCA No LULUCF tab excludes the LULUCF sector. Table 8b-l identifies key categories
for the Base Year, Table 8b-2 identifies key categories for the Current Year, and Table 8b-3 summarizes
key categories from the trend assessment. Like the 8a. Approach 2 KCA LULUCF tab, key categories are
shaded in	and sum to 90 percent. See the example in Figure 16. Note that all LULUCF

categories (beginning with CRT Code 4) are removed from these tables and the key categories differ
from Tables 8a-l through 8a~3 (as shown in Figure 15).

Figure 16. KCA Tool "8b. Approach 2 KCA No LULUCF" Tab

Approach 2 - Level Asse

Table 8b-l. Base Year (2022)

Base Year Estimates (kt CO .e)

Level Assessment

Total Combined Uncertainty

Level Assessment with Uncertainty

Relative Level Assessment with Uncertainty

Cumulative Total

641,918

1.000



0.003

1.00<



26,500.0

0.041

0.040

0.002

0.54!

54%

5,656.0

0.009

0.050

0.000

0.14E

69%

3,180.0

0.005

0.081

0.000

0.13;

82%

4,228.0

0.007

0.050

0.000

0.10!

93%

2,800.0

0.004

0.030

0.000

0.04;



2,222.0

0.003

0.020

0.000

0.023

100%

45.0

0.000

0.100

0.000

0.002

100%

100.0

0.000

0.020

0.000

0.001

100%

IE

0.000

0.000

o.ooo

0.000

100%

19,875.0

0.031

0.000

0.000

0.000

100%

5S,594.0

0.087

0.000

o.ooo

0.000

100%

42,515.0

0.066

0.000

o.ooo

O.OOO

100%

1,515.0

0.002

0.000

o.ooo

0.000

100%

66,780.0

0.104

0.000

0.000

0.000

100%

67,280.0

0.105

0.000

o.ooo

0.000

100%

7b. Approach 1 KCA No LULUCF I 8. Approach 2 Level and Trend I 8a. Approach 2 KCA LULUCF

8b. Approach 2 KCA No LULUCF

Table 8b-2. Current Year (2024)



Current Year Estimates (kt CO^e)

Level Assessment

Total Combined Uncertainty

Level Assessment with Uncertainty

Relative Level Assessment with Uncertainty

Cumulative Total

409,902

1.000



0.007

1.000



14,310.0

0.035

0.081

0.003

0.399

40*

55,456.0

0.135

0.020

0.003

0384

78%

13,250.0

0.032

0.040

0.001

0.183

9796

700.0

0.002

0.050

0.000

0.012

99%

420.0

0.001

0.050

0.000

0.007

100%

50.0

0.000

0.020

0.000

0.000

100%

50.0

0.000

0.000

0.000

0.000

100%

na

0.000

0.000

0.000

0.000

100%

NA

0.000

0.100

0.000

0.000

100%

51,515.0

0.126

0.000

0.000

0.000

100%

78,881.0

0.192

0.000

0.000

0.000

100%

NA

0.000

0.000

0.000

0.000

100%

35,510.0

0.087

0.000

0.000

0.000

100%

61,800.0

0.151

0.000

0.000

0.000

100%

7b. Approach 1 KCA No LULUCF I 8. Approach 2 level and Trend I 8a. Approach 2 KCA LULUCF

8b. Approach 2 KCA No LULUCF

UEjjgg]... ©

Table 8b-3. Trend Assessment

Base Year Estimates (2020)

Current Year Estimates (2022)

Combined Uncertainty

Trend Assessment with Uncertainty

Relative Level Assessment with Uncertainty

Cumulative Total

641,918

409,902

urn

2,222.0
3,180.0
26.500.0
5.656.0
4.228.0
2,800.0
45.0
100.0
IE

19,875.0
55,594.0
42,515.0
1,515.0
66,780.0
67,280.0

55,456.000
14.310.000
13,250.000
420.000
700.000
1,400.000
NA
50.000
50.000
na

51,515.000
78.881.000
NA

35,510.000
61,800.000

0.020
0.081
0.040
0.050
0,050
0.030
0.100
0.020
0.000
0.000
0.000
0.000
0.000
0.000
0.000

0.358
0.301
0.178
0.088
0.059
0.014
0.002
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000

0.351
0,30:
0-17J
0.08i
0,05?
0.014
0.002
0.000
0.000
0,000
0.000
0.000
0.000
0.000
0.000

36%
66%
84%
92%

100%
100%
100%
100%
100%
100%
100%
100%
100%
100%

7b. Approach 1 KCA No LULUCF I 8. Approach 2 Level and Trend I 8a. Approach 2 KCA LULUCF

8b. Approach 2 KCA No LULUCF

- ©

Step 5: Review Key Categories

The	tab provides a summary of all key categories from tabs 7 and 8. A layout of the

tab is provided in Figure 17. A category can be considered a key category for a total of 12

26


-------
December 2024

unique assessments under Approach 1 and Approach 2, as summarized in the following tables. Refer to
Figure A-l for further information on Approaches and Levels.

Figure 17. KCA Tool "9. Key Results" Tab Layout



Approach 1

Base Year ()

Current Year ()

Trend Assessment

Assessment

Base Year Level
1 Assessment
with LULUCF

Base Year Level
1 Assessment
without
LULUCF

Current Year

Level 1
Assessment
with LULUCF

Current Year

Level 1
Assessment
without
LULUCF

Trend 1
Assessment
with LULUCF

Trend 1
Assessment
without
LULUCF

Shorthand

LI LULUCF

LI No LULUCF

LI LULUCF

LI No LULUCF

T1LULUCF

T1 No LULUCF



Approach 2

Base Year ()

Current Year ()

Trend Assessment

Assessment

Base Year Level
2 Assessment
with LULUCF

Base Year Level
2 Assessment
without
LULUCF

Current Year

Level 2
Assessment
with LULUCF

Current Year

Level 2
Assessment
without
LULUCF

Trend 2
Assessment
with LULUCF

Trend 2
Assessment
without
LULUCF

Shorthand

L2 LULUCF

L2 No LULUCF

L2 LULUCF

L2 No LULUCF

T2 LULUCF

T2 No LULUCF

Each key category assessment approach has its own column. If a category is considered key for one of
the key category assessments, the rank of the category for that assessment populates. These ranks can
be found in the tables from abs 7a, 7b, 8a, and 8b. The KCA Threshold is populated from the KCA
Parameters tab. On the ). KCA Results tab, there is a link to allow users to return to the KCA
Parameters tab and select another threshold value to see which categories are considered key under an
alternate KCA threshold (see Figure 18).

Figure 18. Threshold Values Reference Box from KCA Tool "9. KCA Results" Tab

KCA Threshold

Return to the 'KCA Parameters'
worksheet to change the KCA Threshold
and see which key categories are
identified using an alternate threshold.

Return to KCA Parameters Below:

95%

KCA Parameters





Figure 19 shows an example of Table 9-1 from the KCA Results tab. In Figure 19, 2.B.2 - Nitric Acid
Production - N2O category is a key category under all 12 possible key category assessments. For the Base
Year Level 1 Assessment without LULUCF, this category ranks first. Alternatively, 4.A.1 - Forest Land
Remaining Forest Land - C02 category is only a key category for a single Approach 2 key category
assessment with LULUCF.

27


-------
December 2024

Figure 19. KCA Tool "9. KCA Results" Tab

Table 9-1. Key Categories Summary Table

Key Categories

1.A.1 - Fuel Combustion - Energy industries - Gaseous Fuels - CQ2

Identification Criteria

Base Year (2020)

LI
LULUCF

LI

No LULUCF

Approach 1

Current Year (2022)

LI
LULUCF

LI

No LULUCF

Trend Assessment

Li
LULUCF

T1

No LULUCF

L2
LULUCF

Base Year (2020)

L2

No LULUCF

Approach 2

Current Year (2022)

L2
LULUCF

L2

No LULUCF

Trend Assessment

L2	T2

LULUCF No LULUCF

2.B.2 - Nitric Acid Production - N2Q

2.B.5	- Carbide Production - CH4

3.A.1-Cattle-CH4

3.A.3-Swine-CH4	

4.A.1 • Ffiffst [ and Remaining Foren 1 and - CO?

4.A.2	- Land Converted to Forest Land - C02

5.D	- Wastewater Treatment and Discharge - industrial - N20

28


-------
December 2024

Step 6: Review Notation Key Summary

A list of all categories with notation keys for each sector is displayed in 10. Notation Key Summary.

Scroll through each table to see which categories have notation keys. Use the filtered columns to filter
by Sector, CRT Code, Category, Gas, Base Year, and Current Year. If a category is not currently estimated
(NE), based on national circumstances, compilers should consider if it should be key from a qualitative
perspective. The following examples are given by the 2006 IPCC Guidelines and 2019 Refinement as
considerations for qualitatively determining key categories:

No quantitative assessment of uncertainty. Where Approach 2 KCA is not used, inventory
compilers are still encouraged to identify categories that are assumed to contribute most to the
overall uncertainty as key, because the largest reductions in overall inventory uncertainty can be
achieved by improving estimates of categories having higher uncertainties.

•	Completeness. If there are known categories that are excluded from the inventory due to use of
flexibilities in light of capacities (e.g. fluorinated gas emissions), inventory compilers can
research data from countries with similar national circumstances or approximate activity data
(see the 2006 IPCC Guidelines, Volume 1, Chapter 2) to make a preliminary determination as to
whether a category should be considered key.

•	Expected growth. Inventory compilers can use expert judgement to qualitatively assess which
categories are likely to show a substantial increase of emissions or decrease of removals in the
future, identifying such categories as key.

See the example 10. Notation Key Summary tab in Figure 20.

Figure 20. KCA Tool "10. Notation Key Summary" Tab

10. Notation Key Summary

Instructions: This worksheet provides a summary of all categories with notation keys for each sector. Scroll through the table to see which categories have notation
keys. Use the filtered columns to filter by Sector, CRT Code, Category, Gas, Base Year, and Current Year. If a category is not currently estimated (NE), consider it key
from a qualitative perspective.

Table 10-1. Categories with Notation Keys

Sector

CRT Code

Category

Gas

Base Year (2020) -

Current Year (2022) *

Energy

1.A.1

Fuel combustion - Energy Industries - Liquid Fuels

C02

IE



Energy

1.A.1

Fuel combustion - Energy Industries - Liquid Fuels

N20



na

Energy

l.A.l

Fuel combustion - Energy Industries - Solid Fuels

C02



NA

Energy

1.A.1

Fuel combustion - Energy Industries - Solid Fuels

CH4

C

C

Energy

l.A.l

Fuel combustion - Energy Industries ¦ Gaseous Fuels

C02

NE

NE

Energy

l.A.l

Fuel combustion - Energy Industries - Gaseous Fuels

CH4

NE

NE

Energy

1.A1

Fuel combustion - Energy Industries - Gaseous Fuels

N20

NE

NE

Energy

1.A1

Fuel combustion - Energy Industries - Other Fossil Fuels

C02

NE

NE

Energy

1.A.1

Fuel combustion - Energy Industries - Other Fossil Fuels

CH4

NE

NE

Energy

1.A.1

Fuel combustion - Energy Industries - Other Fossil Fuels

N20

NE

NE

Energy

1.A.1

Fuel combustion - Energy Industries - Peat

CH4

NA

NA

Energy

1.A1

Fuel combustion - Energy Industries - Peat

N20

NO

NO

Energy

1.A1

Fuel combustion - Energy Industries - Biomass

CH4

IE

IE

Energy

l.A.l

Fuel combustion - Energy Industries - Biomass

N20

IE

IE

IPPU

2.A2

Lime Production

C02



NA

IPPU

2.A3

Glass Production

C02

C

C

IPPU

2.C.1

Iron and Steel Production

C02

NA



IPPU

2.E

Electronics Industry

CF4

NE

NE

Agriculture

3.A.l.a.i

Dairy Cattle

CH4

NE

NE

Agriculture

3.B. l.a.il

Non-dairy Cattle

CH4

C

C

LULUCF

4.A.1.C

Forest land remaining forest land - soil (mineral)

C02

IE

IE

Waste

5.A

Solid Waste Disposal - Industrial Solid Waste Disposal

CH4

NE



:a. Approach 2 KCA LULUCF I 8b. Approach 2 KCA No LULUCF | 9. KCA Results

10. Notation Key Summary

©

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Additional Information

There are two BLACK tabs at the end of the tool that provide additional information.

The GWP tab provides the 100-year GWP values from Table 8.A.1 in Appendix 8.A of Chapter 8 in the
IPCC Working Group I Fifth Assessment Report11 and Table 7.SM.7, located in Chapter 7 in the IPCC
Working Group I Sixth Assessment Report.12

At the bottom of each of the GWP tables, there are five yellow rows to enter any additional gases and
GWP values not captured in the tables. Use the links to IPCC reports table to identify the correct GWP to
use for any additional gas.

The IPCC Codes tab provides a crosswalk of key category codes found in the 2006 IPCC Guidelines
(consistent with Vol. 1, Chapter 4, Table 4.1 excluding special considerations)13 and the CRT codes used
in version 3.0 of the KCAtool.

11	https://archive.ipcc.ch/pdf/assessment-report/ar5/wgl/drafts/WGlAR5 SOD Ch08 All Final.pdf

12	https://www.ipcc.ch/report/ar6/wgl/downloads/report/IPCC_AR6_WGI_Chapter07_SM.pdf

13	Volume 1, Chapter 4, Table 4.1 of the 2006 IPCC Guidelines suggests a level of aggregation for KCA.
https://www.ipcc-nggip.iges.or.ip/public/2006gl/

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Appendix 1: Reference Information

Figure A-l provides a table of definitions of terms used throughout the tool that is also provided on the
General Information tab in the KCA Tool.

Figure A-l. Definitions Table from the KCA Tool "General Information" Tab

Approach 1

Definition

The key category analysis is completed without incorporating uncertainties in emissions
factor or activity data.

Approach 2

The key category analysis is completed with uncertainties in emissions factor or activity
data.

The starting year for the national GHG inventory time series. See the MPGs for
Base Year information on reporting requirements for time series, including start year (See Chapter
II of Annex to 18 CMA.l).

Emissions for the most recent year that the national GHG inventory was compiled. See
Current the MPGs for information on time series reporting requirements, including
Year	requirements and flexibility in relation to the latest reported year in time series (See

Chapter II of Annex to 18 CMA.l).

Estimates In the context of this tool, estimates refer to both emissions and removals.

A key category is one that is prioritized within the national inventory system because its
Key	estimate has a significant influence on a country's total inventory of greenhouse gases

Category in terms of the absolute level, the trend, or the uncertainty in emissions and removals.

Whenever the term key category is used, it includes both source and sink categories.

Level

Assessment

A level assessment is the absolute level of emissions/removals for a particular year of
interest. Any country that has developed a greenhouse gas inventory can perform an
Approach 1 Level Assessment to identify the categories whose level has a significant
effect on total national emissions and removals. Any country that has developed a
greenhouse gas inventory AND has information on uncertainty values can perform an
Approach 2 Level Assessment to identify the categories whose level has a significant
effect on total national emissions and removals.

The purpose of the trend assessment is to identify categories that may not be large
enough to be identified by the level assessment, but whose trend is significantly
Trend	different from the trend of the overall inventory, and should therefore receive

Assessment particular attention. The trend assessment identifies categories with trends that are
different from the trend of the total inventory, regardless of whether the category
trend is increasing or decreasing, or is a sink or source.

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Figure A-2 provides a list of acronyms used throughout the tool that is also provided on the
Informatio tab in the KCATool.

Figure A-2. Acronym Table from KCA Tool "General Information" Tab

Acronym

Definition

BTR

Biennial transparency report

CRT

Common Report Tables

Gg

Gigagram

GHG

Greenhouse gas

GL

Guidelines

GWP

Global warming potential

IPCC

Intergovernmental Panel on Climate Change

KCA

Key Category Analysis

Kt

Kilotons

LULUCF

Land Use, Land-Use Change and Forestry

MPG

Modalities, Procedures, and Guidelines

Figure A-3 provides the notation key acronym and definition table that is also provided on the
Informatio tab in the KCATool. Notation keys are used in the DARK BLUE KCA Input - Sector data input
tabs if emissions or removals are not reported for a category. More information on the DARK BLUE KCA
Input - Sector data input tabs are discussed under Step 2: Enter Emissions and Removals Data and
Uncertainty Values in this Data Entry Guide.

Figure A-3. Notation Key Table from KCA Tool "General Information" Tab

Notation Keys for

KCA Input - Sector	Definition

Data Input Tabs 1-6

For categories or processes, including recovery, under a particular source or sink
NO (Not Occurring) category that do not occur within a Party.

For activity data and/or emissions by sources and removals by sinks of GHGs
that have not been estimated but for which a corresponding activity may occur
NE (Not Estimated) within a Party.

For activities under a given source/sink category that do occur within the Party
NA (Not Applicable) but do not result in emissions or removals of a specific gas.

IE (Included	For emissions by sources and removals by sinks of GHGs estimated but included

Elsewhere)	elsewhere in the inventory instead of under the expected source/sink category.

For emissions by sources and removals by sinks of GHGs where the reporting
would involve the disclosure of confidential information. If emissions are
considered confidential, consider reporting emissions at a higher level of
aggregation (e.g., category instead of sub-category) in order to assess
C (Confidential)	significance through the Key Category Analysis.

For more information on notation keys, see Chapter II of Annex to 18 CMA.l.

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