Emissions of Greenhouse Gases in the United States 1997 - Table ES1. U.S. Emissions of Greenhouse Gases by Gas, 1990-1998

Table ES2. U.S. Emissions of Greenhouse Gases by Gas, Based on Global Warming Potential,1990-1998
(Million Metric Tons of Carbon or Carbon Equivalent)

Gas	1990	1991	1992	1993	1994	1995	1996	1997	P1998
Carbon Dioxide	1,347	1,333	1,356	1,389	1,410	1,424	1,472	1,490	1,495
Methane	173	174	175	171	172	173	168	168	165
Nitrous Oxide	99	101	103	103	111	106	105	104	103
HFCs, PFCs, and SF₆	22	22	23	24	26	32	36	38	40
Total	1,641	1,629	1,657	1,686	1,719	1,735	1,780	1,800	1,803
P = preliminary data. Note: Data in this table are revised from the data contained in the previous EIA report, Emissions of Greenhouse Gases in the United States 1997, DOE/EIA-0573(97) (Washington, DC, October 1998). Sources: EIA estimates documented in this report.