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Health and Science > Environment and Nature > Environment

U.S. Emissions of Greenhouse Gases, 1990–2000

(million metric tons of gas for carbon dioxide and methane; thousand metric tons for nitrous oxide)

Gas 1990 1993 1994 1995 1996 1997 1998 1999 2000
Carbon dioxide 4,990.6 5,170.0 5,255.0 5,308.5 5,495.6 5,559.3 5,594.0 5,673.9 5,853.4
Methane 30.5 29.4 29.3 29.2 28.3 28.3 27.4 26.8 26.6
Nitrous oxide 1.1 1.2 1.3 1.2 1.2 1.2 1.2 1.2 1.2
Source: Compiled by the U.S. Energy Information Administration. Web: www.eia.doe.gov .

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

U.S. Emissions of Greenhouse Gases, 2001–2006 Environment Air Quality in Selected U.S. Cities, 1990–2000

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