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Vehicle
Emissions
Vehicles emit a lot
of pollutants. Because the United States has more drivers than any other
country, we are guilty of putting a lot of emissions like carbon monoxide,
nitrogen oxides, volatile organic compounds, particulate matters, sulfur
dioxide, and lead into the air.
Transportation's share of
emissions generating in the United States
1998 statistics
| carbon monoxide
(CO) |
78.6%
|
| nitrogen oxide
(NOx) |
53.4%
|
| volatile organic
compounds (VOC) |
43.5%
|
| particulate
matter 10 micrometers or less in size (PM-10) |
2.1%
|
| particulate
matter 2.5 micrometers or less in size (PM-2.5) |
7.2%
|
| sulfur dioxide |
7.2%
|
| lead* |
13.1%
|
* In 1970, transportation's
share of lead emissions was 82.3%.
Source
Davis, Stacy. Center for Transportation
Analysis, Oak Ridge National Laboratory. Transportation Energy Data
Book: Edition 20 – 2000. Chapter 4 Criteria Pollutants, 4-1.
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