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Page Header: Air Pollution

About 150 million people live in counties where monitored air pollution levels in 2007 reached unhealthy levels.Air Pollution Photograph

Highway vehicles are a major contributor to air pollution in the U.S., producing 26-62% of key chemicals that cause smog and health problems.

  • Carbon monoxide (CO) - 62%
  • Nitrogen oxides (NOx) - 36%
  • Hydrocarbons - 26%

All new cars must meet federal emissions standards, but as vehicles get older, the amount of pollution they produce increases. Therefore, vehicles with better fuel economy may pollute less than those with lower fuel economy.

Choose A Clean Vehicle

Fueleconomy.gov's Find-a-Car feature provides air pollution information to help you choose the cleanest vehicle that meets your needs.
Sample Air Pollution Score (6 out of 10 rating)Sample Air Pollution Score (6 out of 10 rating)
Sample air pollution score

Data Sources

Population exposed to air pollution: U.S. Environmental Protection Agency, Office of Air & Radiation website, accessed August 15, 2008.

Highway vehicle emission shares based on EPA's National Emissions Inventory (NEI) Air Pollutant Emissions Trends Data. (Highway vehicle shares calculated based on 2006 total emissions, excluding "miscellaneous" sources such as fires.)