TABLE 72  Share of Selected Air Pollution Emissions by Mode: 2001,,,,,
(Percent),,,,,
,,,,,
,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.",,,,,