Figure 15-1 - Transportation Air Pollutant Emissions by Type: 1992-2002

Figure 15-1 - Transportation Air Pollutant Emissions by Type: 1992-2002

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Figure 15-1 Transportation Air Pollutant Emissions by Type: 1992-2002. 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 = particulate matter of 10 microns in diameter or smaller; PM-2.5 = particulate matter of 2.5 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%. Other includes recreational boats, airport service vehicles, and road maintenance equipment. To make it easier to compare data of differing magnitudes over time, the Bureau of Transportation Statistics divided the data for all years in each category (see table 15-1b in appendix B) by the initial year value and multiplied the result by 100.

SOURCE: U.S. Environmental Protection Agency, 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.