CONNECTICUT GREENHOUSE GAS EMISSIONS AND SINKS INVENTORY:

SUMMARY

Connecticut Greenhouse Gas Emissions for 1990

Million Metric Tons of Carbon Equivalent







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v w /M y

Total Waste Agriculture Industry Land Use
Energy

Sector

~ carbon
equivalent

The report "Connecticut's Greenhouse Gas Emissions Inventory: 1990 and 1995
Calendar Years" provides a detailed inventory of greenhouse gas emissions and sinks
for Connecticut in 1990 and 1995. To be consistent with other states' inventory
summaries, this summary focuses on Connecticut's estimates for 1990.

Emissions were estimated using methods from the draft 1998 version of EPA's guidance
document State Workbook: Methodologies for Estimating Greenhouse Gas
Emissions. In 1990, Connecticut emitted 11.4 million metric tons of carbon equivalent
(MMTCE). Connecticut estimated emissions of significantly less than 0.1 MMTCE from
other sources. These emissions are not included in the reported total or the table
below.1

The principal greenhouse gases were carbon dioxide, comprising 39.0 million metric
tons (10.6 MMTCE), and methane, with 0.1 million metric tons (0.7 MMTCE). Other
emissions included less than 0.01 million metric tons of nitrous oxide (<0.1 MMTCE).

1 Note that the state of the art emission inventory method has advanced since Connecticut
completed its inventory; therefore, we excluded emission estimates for sources not covered by
the most recent inventory guidance (http://www.epa.gov/ttnchie1/eiip/techrep.htrrtfareen). These
emissions include the use of international bunker fuels.

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Connecticut Greenhouse Gas Emissions for 1990

SECTOR

co2

(MMTCE)

Methane
(MMTCE)

Nitrous Oxide
(MMTCE)

HFCs, PFCs,
and SFs
(MMTCE)

Total GHG
Emissions
(MMTCE)

Energy - Residential

2.0

*

*

*

2.0

Energy - Commercial

1.0

*

*

*

1.0

Energy - Industrial

1.2

*

*

*

1.2

Energy - Transport

4.0

*

*

*

4.0

Energy - Utility

2.6

*

*

*

2.6

Energy - Exported Electricity

*

*

*

*

*

Energy - Other

*

0.0

*

*

0.0

Total Energy

10.6

0.0

*

*

10.6

Waste

0.1

0.7

0.0

*

0.8

Agriculture

0.0

0.0

0.0

*

0.1

Industry

0.0

*

*

*

0.0

Land Use

-0.2

*

*

*

-0.2

Total

10.6

0.7

0.0

*

11.4

All emissions are reported in million metric tons of carbon equivalent (MMTCE).

An asterisk ( * ) indicates that emissions of the gas from this sector were zero, insignificant, or not reported.

Emissions due to coal mining and extraction of natural gas and oil are included in the total energy figures,
and emissions from biofuel combustion are excluded.

The major source of carbon dioxide emissions was fossil fuel combustion (98%), with
minor emissions from waste combustion (1%) and limestone use in industry (<1%).
Fossil fuel combustion for the residential, transportation, and utility sectors comprised
80% of the carbon dioxide emissions from the fossil fuel combustion, primarily from use
of petroleum. Carbon dioxide sinks (i.e., an increase in forest carbon storage) offset
approximately over 1% of the total carbon dioxide emissions. Contributors to methane
emissions were landfills (93%), domesticated animals (5%), manure management (1%),
wastewater (1%), and natural gas distribution (<1%). Nitrous oxide emissions were from
fertilizer use (54%) and waste combustion (46%).

Connecticut emissions in 1990 were 2.9 MTCE per capita, compared to 1990 U.S.
emissions of 6.4 MTCE per capita.

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