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- State Emissions
- Energy CO2 Emissions by State
- State Greenhouse Gas Inventories
- State Inventory Guidance
Energy CO2 Emissions by State
This section provides state carbon dioxide (CO2) emission inventories from fossil fuel combustion, by sector (commercial, industrial, residential, transportation, and electric utilities), in million metric tons of carbon dioxide (MMTCO2) from 1990 though 2005.
Download State Energy CO2 Data
The tables are available for viewing in Adobe Acrobat format or in Microsoft
Excel format for spreadsheet analysis.
- View State CO2 Emissions from fossil fuel combustion, 1990-2005 (PDF, 7 pp., 28 KB, About PDF)
- Download in Microsoft Excel format (XLS, 112 KB)
Notes on Units and Methods
Greenhouse gases differ in their ability to trap heat. For example, one ton
of emissions of CO2 has a different effect
than one ton of emissions of methane. To compare
emissions of different greenhouse gases, inventory compilers use a weighting
factor called a “Global Warming Potential” or “GWP.” To use a GWP, the heat-trapping ability of one metric ton (1,000 kilograms)
of CO2 is taken as the standard, and emissions
are expressed in terms of CO2 equivalent,
but can also be expressed in terms of carbon equivalent. Carbon comprises
12/44 of the mass of carbon dioxide; thus to convert from CO2 equivalent
to carbon equivalent, multiply by 12/44. For more information on global warming
potential and energy conversion factors, see the Introduction (PDF,
18 pp., 425 KB, About PDF) and Annex 6 (PDF,
22 pp., 439 KB, About PDF) of the U.S. Emissions Inventory 2008.
EPA developed state-level CO2 estimates using (1) fuel consumption data from the DOE/EIA State Energy Data 2005 Consumption tables and (2) emission factors from the U.S. Emissions Inventory 2008. EPA's data may differ slightly from state-authored inventories because of methodological differences, including scope of coverage, underlying data, emission factors or assumptions.