"Table 12.1  Emissions of Greenhouse Gases, 1980-2005"																
Year	Greenhouse Gases						"Greenhouse Gases, Based on Global Warming Potential 1"									
			Methane			HFCs			Methane				HFCs		Total	
	Carbon				Nitrous	PFCs	Carbon				Nitrous		PFCs			
	"Dioxide 2,3"				Oxide	SF6	Dioxide 2				Oxide		SF6			
	Million Metric Tons of Gas						Million Metric Tons Carbon Dioxide Equivalent 2									
1980	"4,824.70"		28.6		1	– –	"4,824.70"		658		287		70.4		"5,840.00"	
1981	"4,704.30"		29.2		1	– –	"4,704.30"		671.1		292		74		"5,741.30"	
1982	"4,448.80"		29.4		1	– –	"4,448.80"		676.8		282.6		55.4		"5,463.70"	
1983	"4,408.00"		29.1		0.9	– –	"4,408.00"		669.9		270.2		67.1		"5,415.30"	
1984	"4,655.80"		29.8		1	– –	"4,655.80"		684.5		294		75.5		"5,709.90"	
1985	"4,638.30"		30		1.1	– –	"4,638.30"		689.7		330.7		70.5		"5,729.30"	
1986	"4,642.50"		29.4		1.1	– –	"4,642.50"		676.5		323.8		75		"5,717.80"	
1987	"4,800.20"		29.9		1.1	– –	"4,800.20"		688.3		323.4		77.8		"5,889.80"	
1988	"5,012.60"		30.1		1.1	– –	"5,012.60"		692		316.9		91.3		"6,112.80"	
1989	"5,105.80"		30.2		1.1	– –	"5,105.80"		693.8		332.8		94.5		"6,226.90"	
1990	"4,990.60"	[R]	30.5	[R]	1.1	– –	"4,990.60"	[R]	701.7	[R]	333.5	[R]	87.1	[R]	"6,112.80"	[R]
1991	"4,940.60"	[R]	30.4	[R]	1.2	– –	"4,940.60"	[R]	698.2	[R]	342.6		79	[R]	"6,060.40"	[R]
1992	"5,056.60"	[R]	30.4	[R]	1.2	– –	"5,056.60"	[R]	700.2	[R]	349.7		83.7	[R]	"6,190.10"	[R]
1993	"5,170.00"	[R]	29.4	[R]	1.2	– –	"5,170.00"	[R]	675.7	[R]	349.1	[R]	82.9	[R]	"6,277.80"	[R]
1994	"5,255.00"	[R]	29.3	[R]	1.3	– –	"5,255.00"	[R]	674.7	[R]	374.5		85.2	[R]	"6,389.50"	[R]
1995	"5,308.50"	[R]	29.2	[R]	1.2	– –	"5,308.50"	[R]	672.5	[R]	357.7	[R]	94.9	[R]	"6,433.50"	[R]
1996	"5,495.60"	[R]	28.3	[R]	1.2	– –	"5,495.60"	[R]	651.3	[R]	357.9	[R]	110.6	[R]	"6,615.40"	[R]
1997	"5,559.30"	[R]	28.3	[R]	1.2	– –	"5,559.30"	[R]	650.8	[R]	350.1	[R]	118.1	[R]	"6,678.40"	[R]
1998	"5,594.00"	[R]	27.4	[R]	1.2	– –	"5,594.00"	[R]	629.8	[R]	348.8		134.3	[R]	"6,707.00"	[R]
1999	"5,673.90"	[R]	26.8	[R]	1.2	– –	"5,673.90"	[R]	616.5	[R]	346.8	[R]	133.9	[R]	"6,771.10"	[R]
2000	"5,853.40"	[R]	26.6	[R]	1.2	– –	"5,853.40"	[R]	611.2	[R]	342.8	[R]	138	[R]	"6,945.40"	[R]
2001	"5,767.00"	[R]	26	[R]	1.1	– –	"5,767.00"	[R]	597.7	[R]	337.9	[R]	128.5	[R]	"6,831.00"	[R]
2002	"5,814.70"	[R]	26.1	[R]	1.1	– –	"5,814.70"	[R]	600.2	[R]	333.6	[R]	137.8	[R]	"6,886.30"	[R]
2003	"5,875.30"	[R]	26.2	[R]	1.1	– –	"5,875.30"	[R]	602.2	[R]	332.9	[R]	136.6	[R]	"6,946.90"	[R]
2004	"5,988.70"	[R]	26.4	[R]	1.2	– –	"5,988.70"	[R]	606.5	[R]	359.9	[R]	149.5	[R]	"7,104.60"	[R]
2005P	"6,008.60"		26.6		1.2	– –	"6,008.60"		611.9		366.6		160.2		"7,147.20"	
1Emissions of greenhouse gases are weighted based upon their relative global warming potential								Notes:  ·  HFCs = hydrofluorocarbons; PFCs = perfluorocarbons; and SF6 = sulfur hexafluoride.								
"(GWP), with carbon dioxide equal to a weight of one.  The use of updated estimates of GWP resulted in a"								"·  Emissions are from anthropogenic sources.  ""Anthropogenic"" means produced as the result of human"								
number of revisions to previously published data.  It is also important to note that revisions in estimated								"activities, including emissions from agricultural activity and domestic livestock.  Emissions from natural"								
emissions result from revisions in energy consumption as well.								"sources, such as wetlands and wild animals, are not included.  ·  Because of the continuing goal to improve"								
								"estimation methods for greenhouse gases, data are frequently revised on an annual basis in keeping with"								
								the latest findings of the international scientific community.  ·  Totals may not equal sum of components due								
								to independent rounding.								
2Metric tons of carbon dioxide can be converted to metric tons of carbon equivalent by multiplying by								"Web Page:  For related information, see http://www.eia.doe.gov/environment.html."								
12/44.																
3Carbon dioxide data in this table differ from those for the United States in Table 11.19 due to:  the								"Sources:  1990, 1995, and 1998-2005:  Energy Information Administration (EIA), Emissions of"								
exclusion of emissions from international bunker fuels consumption; the inclusion of emissions from								"Greenhouse Gases in the United States 2005 (November 2006), Tables ES1 and ES2.  All Other Data: "								
"geothermal power generation, cement production and other industrial processes, and municipal solid waste"								"EIA, Emissions of Greenhouse Gases in the United States, annual reports and unpublished revisions."								
combustion; and the inclusion of data for the U.S. Territories.																
R=Revised.  P=Preliminary.  – – = Not applicable because these gases cannot be summed in native units.