Million metric tons of carbon
Notes: 2005 data are preliminary.
One ton of carbon equals 3.667 tons of carbon dioxide gas. Electric utility emissions are distributed across sectors.
Sources: 1980-1989-U.S. Department of Energy (USDOE), Energy Information Administration (EIA), Emissions of Greenhouse Gases in the United States, Appendix E, available at http://www.eia.doe.gov, as of December 2005. 1990-2004-USDOE, EIA, U.S. Carbon Dioxide from Energy Sources 2005 Flash Estimate, available at http://www.eia.doe.gov/, as of June 2006.