TABLE E-3 Transportation Air Pollutant Emissions from On-Road Mobile Sources: 1995-2006

TABLE E-3 Transportation Air Pollutant Emissions from On-Road Mobile Sources: 1995-2006

Millions of short tons

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  Carbon monoxide Nitrogen oxides Volatile organic compounds Sulfur dioxide
All sources Transportation, total Transportation (percent of total) All sources Transportation, total Transportation (percent of total) All sources Transportation, total Transportation (percent of total) All sources Transportation, total Transportation (percent of total)
1995 126.78 83.88 66 24.96 8.88 36 22.04 6.75 31 18.62 0.34 2
1996 128.86 78.61 61 24.79 8.73 35 20.87 6.22 30 18.39 0.30 2
1997 117.91 75.85 64 24.71 8.79 36 19.53 5.99 31 18.84 0.30 2
1998 115.38 73.24 63 24.35 8.62 35 18.78 5.86 31 18.94 0.30 2
1999 114.54 68.71 60 22.84 8.37 37 18.27 5.68 31 17.54 0.30 2
2000 114.47 68.06 59 22.60 8.39 37 17.51 5.33 30 16.35 0.26 2
2001 106.26 63.48 60 21.55 7.77 36 17.11 4.95 29 15.93 0.25 2
2002 109.24 62.96 58 21.28 8.13 38 19.40 4.66 24 14.62 0.26 2
2003 107.06 60.74 57 20.48 7.75 38 18.89 4.46 24 15.02 0.24 2
2004 104.89 58.53 56 19.56 7.37 38 18.39 4.26 23 14.67 0.22 2
2005 102.72 56.32 55 18.95 6.98 37 17.89 4.05 23 14.63 0.21 1
2006 100.55 54.10 54 18.23 6.60 36 17.38 3.85 22 13.77 0.19 1

NOTES: Previous edition's data include all on-road mobile sources and some nonroad mobile sources, since EPA changed the methodology to estimate emissions, the details of the data are not available, this data set only contains the on-road mobile sources.

SOURCE: U.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, Internet website http://www.epa.gov/ttn/chief/trends/index.html as of July 2007.