Figure 15 Index of Key Air Pollutant Emissions from U.S. Transportation: 1975-2000

Figure 15 Index of Key Air Pollutant Emissions from U.S. Transportation: 1975-2000

(Index: 1975= 1.0, 1990 = 1.0 for PM-2.5 and ammonia)

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Figure 15 - Index of Key Air Pollutant Emissions from U.S. Transportation: 1975-2000. If you are a user with disability and cannot view this image, use the table version. If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - Carbon monoxide. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - Ammonia. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - Lead. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - Volatile organic compounds. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - Nitrogen oxides. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.Index of Key Air Pollutant Emissions from U.S. Transportation - PM-2.5; PM-10. If you are a user with disability and cannot view this image, use the table version.  If you need further assistance, call 800-853-1351 or email answers@bts.gov.

Key: PM-10 and PM-2.5 = airborne particulates of less than 10 microns or 2.5 microns in diameter, respectively.

Note: Transportation emissions include all onroad mobile sources and the following nonroad mobile sources: recreational vehicles and boats, airport service equipment, aircraft, commercial marine vessels, and railroads. Other nonroad sources, e.g., farming equipment, are not included. Lead estimates include onroad mobile sources only.

Source: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, National Air Pollutant Trends, available at http://www.epa.gov/ttn/chief/trends/index.html, as of September 2002.