MISSISSIPPI GREENHOUSE GAS EMISSIONS AND SINKS INVENTORY:

SUMMARY

Mississippi Greenhouse Gas Emissions for 1992

Million Metric Tons of Carbon Equivalent



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Total Energy Waste

Agriculture
Sector

Industry Land Use

~ carbon
equivalent

The report "Summary of Greenhouse Gas Inventory for Mississippi" provides a detailed
inventory of greenhouse gas emissions and sinks for Mississippi in 1992. Emissions
were estimated using methods from EPA's 1992 guidance document State Workbook:
Methodologies for Estimating Greenhouse Gas Emissions. In 1992, Mississippi
emitted 25.1 million metric tons of carbon equivalent (MMTCE). Mississippi estimated
emissions of 1.1 MMTCE from sources not covered in the workbook. Emissions from
these sources are not included in the reported total or the table below.1

The principal greenhouse gas was carbon dioxide, comprising 51.1 million metric tons
(13.9 MMTCE). Other emissions included 0.63 million metric tons of methane (3.6
MMTCE), and 0.1 million metric tons of nitrous oxide (7.6 MMTCE).

1 Note that the state of the art emission inventory method has advanced since Mississippi
completed its inventory; therefore, we have made the following adjustments to Mississippi's
emission estimates. First, 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 carbon dioxide from combustion of other liquids, and from landfills. Second, we used
updated carbon coefficients for some fuel types. Third, we used updated values for global
warming potentials.

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Mississippi Greenhouse Gas Emissions for 1992

SECTOR

co2

(MMTCE)

Methane
(MMTCE)

Nitrous Oxide
(MMTCE)

HFCs, PFCs,
and SF6
(MMTCE)

Total GHG
Emissions
(MMTCE)

Energy - Residential

0.5

*

*

*

0.5

Energy - Commercial

0.4

*

*

*

0.4

Energy - Industrial

2.9

*

*

*

2.9

Energy - Transport

6.2

*

*

*

6.2

Energy - Utility

3.0

*

*

*

3.0

Energy - Exported Electricity

*

*

*

*

*

Energy - Other

0.9

*

*

*

0.9

Total Energy

13.9

0.01

*

*

13.9

Waste

*

0.9

*

*

0.9

Agriculture

*

2.7

7.6

*

10.2

Industry

0.1

*

*

*

0.1

Land Use

*

*

*

*

*

TOTAL

13.9

3.6

7.6

*

25.1

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 energy - other
figures, and emissions from biofuel combustion are excluded.

The major source of carbon dioxide emissions was fossil fuel combustion (99.5%), the
majority of which is transportation petroleum. Carbon dioxide emissions and sinks
resulting from land use were estimated in this inventory, however, they are not included
in this summary because Mississippi did not break out forest and land use changes by
type of forest as described in the workbook methodology. Sources of methane
emissions included agricultural burning (43%), landfills (26%), domesticated animals
(21%), manure management (7%), and rice cultivation (3%). Nitrous oxide emissions
were accounted for by fertilizer use (95%) and agricultural burning (5%).

Mississippi's emissions in 1992 were 9.8 MTCE per capita, compared to 1992 U.S.
emissions of 5.2 MTCE per capita. High per-capita GHG emissions in the state are
largely due to high emissions in the agricultural sector. The state's greenhouse gas
emissions from agriculture include N20 emissions from nitrogen fertilizers, and methane
emissions from manure management, ruminant livestock, and rice cultivation.

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