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TABLE 72 Share of
Selected Air Pollution Emissions by Mode: 2001
(Percent)
Excel | CSV | Graphic Version
| Highway gasoline |
92.9 |
41.7 |
74.7 |
27.1 |
| Highway diesel |
1.4 |
37.5 |
3.6 |
37.8 |
| Aircraft |
5.1 |
0.8 |
0.3 |
0.9 |
| Marine vessels |
0.3 |
9.7 |
0.0 |
13.1 |
| Railroad |
0.2 |
9.6 |
0.6 |
7.4 |
| Other |
0.1 |
0.8 |
20.2 |
13.7 |
KEY: CO = carbon monoxide; NOx = nitrogen
oxides; VOC = volatile organic compounds; PM-10 = particulate matter 10
microns in diameter or smaller.
NOTES:
EPA no longer estimates lead emissions. Modal shares in 2000
were: highway gasoline vehicles, 4.1%; aircraft, 95.9%. Highway gasoline
vehicles include: light-duty gas vehicles and motorcycles, light-duty gas
trucks, and heavy-duty gas vehicles. Highway diesel includes heavy-duty
diesel vehicles, 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. Environmental Protection Agency (EPA), Office of Air
Quality Planning and Standards, "National Emissions Inventory, Air
Pollutant Emission Trends," available at http://www.epa.gov/ttn/chief/trends/index.html/, as of December 2002.
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