TABLE 72 Share of Selected Air Pollution Emissions by Mode: 2001
TABLE 72 Share of Selected Air Pollution Emissions by Mode: 2001
(Percent)
Excel | CSV | Graphic Version
| CO | NOx | VOCs | PM-10 | |
|---|---|---|---|---|
| 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.