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TABLE 15-2 Share of Selected Air Pollutants by Mode:
2002
Percent
Excel | CSV | Graphic Version
| Highway gasoline |
91.8 |
42.1 |
73.1 |
28.4 |
| Highway diesel |
1.5 |
36.0 |
3.5 |
35.3 |
| Aircraft |
0.4 |
0.9 |
0.4 |
0.9 |
| Marine vessels |
0.2 |
10.7 |
0.5 |
13.8 |
| Railroad |
0.1 |
9.4 |
0.6 |
6.9 |
| Other |
6.0 |
1.0 |
21.9 |
14.7 |
| Total |
100.0 |
100.0 |
100.0 |
100.0 |
KEY: CO = carbon monoxide; NOx = nitrogen
oxides; VOC = volatile organic compounds; PM-10 = particulate matter of 10
microns in diameter or smaller.
NOTES: Percentages may not add to 100 because of
independent rounding. EPA no
longer estimates lead emissions. Modal
shares in 2000 were: highway gasoline vehicles, 4.1%; aircraft, 95.9%. Highway gasoline
includes light-duty gas vehicles and motorcycles, light-duty gas trucks, and
heavy-duty gas vehicles. Highway diesel includes
heavy-duty diesel vehicles, and light-duty diesel trucks and vehicles. Marine
vessels include coal, diesel, residual oil,
gasoline, and other. Other includes diesel
and gasoline recreational vehicles, airport service, railway maintenance, and
recreational marine service. This
table does not include farm, construction, industrial, logging, light
commercial, and lawn and garden equipment.
SOURCE: U.S. Department of Transportation,
Research and Innovative Technology Administration, Bureau of Transportation
Statististics calculations using data from U.S. Environmental Protection
Agency (EPA), Office of Air Quality Planning and Standards, National Emissions Inventory, 2002 Air Pollutant Emission
Trends, available at
http://www.epa.gov/ttn/, as of March 2005.
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