| Table 1. U.S. emissions of greenhouse gases, based on global warming potential, 1990-2009 | | | | | | | | | | | | | | |
| (Million Metric Tons of Carbon Dioxide Equivalent) | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | |
| Greenhouse Gas | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 |
| | | | | | | | | | | | | | | | | | | | |
| Carbon dioxide | 5,040.9 | 4,997.2 | 5,106.2 | 5,216.7 | 5,297.3 | 5,353.4 | 5,539.8 | 5,607.5 | 5,643.6 | 5,709.1 | 5,900.3 | 5,807.7 | 5,866.8 | 5,923.3 | 6,031.3 | 6,055.2 | 5,961.6 | 6,059.5 | 5,865.5 | 5,446.8 |
| Methane | 768.8 | 769.6 | 772.4 | 744.2 | 745.4 | 732.7 | 721.7 | 706.4 | 688.5 | 669.0 | 663.1 | 649.3 | 650.9 | 660.6 | 661.6 | 669.2 | 678.5 | 690.9 | 724.2 | 730.9 |
| Nitrous oxide | 221.4 | 223.1 | 227.8 | 229.3 | 240.9 | 236.2 | 237.6 | 224.1 | 221.6 | 220.0 | 217.8 | 210.9 | 210.5 | 211.8 | 222.0 | 223.6 | 223.7 | 228.6 | 223.5 | 219.6 |
| HFCs, PFCs, and SF6 | 102.1 | 92.9 | 97.5 | 97.1 | 100.0 | 119.4 | 130.4 | 138.1 | 154.2 | 151.8 | 154.0 | 141.5 | 151.8 | 145.4 | 157.0 | 161.3 | 163.6 | 171.4 | 169.9 | 178.2 |
| Total | 6,133.2 | 6,082.8 | 6,203.9 | 6,287.3 | 6,383.6 | 6,441.7 | 6,629.6 | 6,676.1 | 6,707.8 | 6,750.0 | 6,935.3 | 6,809.4 | 6,880.0 | 6,941.1 | 7,071.9 | 7,109.4 | 7,027.4 | 7,150.4 | 6,983.1 | 6,575.5 |
| Difference from 2005 | | | | | | | | | | | | | | | | | (82.0) | 41.0 | (126.3) | (533.8) |
| Percent difference from 2005 | | | | | | | | | | | | | | | | | -1.2% | 0.6% | -1.8% | -7.5% |
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| aHydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). | | | | | | | | | | | | | | | |
| Notes: Data in this table are revised from the data contained in the previous EIA report, Emissions of Greenhouse Gases in the United States | | | | | | | | | | |
| 2008, DOE/EIA-0573(2008) (Washington, DC, December 2009). Totals may not equal sum of components due to independent rounding. | | | | | | | | | | | |
| Sources: Emissions: EIA estimates. Global Warming Potentials: Intergovernmental Panel on Climate Change, Climate Change 2007: The | | | | | | | | | | | |
| Physical Science Basis: Errata (Cambridge, UK: Cambridge University Press, 2008), web site http://ipcc-wg1.ucar.edu/wg1/Report/ | | | | | | | | | | | |
| AR4WG1_Errata_2008-12-01.pdf. | | | | | | | | | | | | | | | | | | | | |