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Vehicles, Health & Global Warming |
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Though efforts to curb vehicle pollution have made an impact, much more remains to be done. Consider:
- Even if every vehicle on the road in 2009 met federal Tier 2 emission standards, the U.S. vehicle fleet would still emit 500,000 tons of smog-forming pollution every year.
- In 2020, when more than 75 percent of vehicles on the road will meet Tier 2 emission standards, passenger vehicles will still generate emissions that represent a cancer risk equivalent to 350,000 tons of benzene released into the atmosphere every year.
- Only four nations in the world produce more heat-trapping carbon dioxide than the U.S. vehicle fleet. This pollution is expected to cause worse smog, an increase in asthma-triggering pollens and molds, and a substantial rise in the number of heat-related illnesses and deaths.
- Diesel-powered vehicles account for nearly half of all nitrogen oxides and more than two-thirds of all particulate matter (soot) produced by the U.S. transportation sector. Soot irritates the eyes and nose and aggravates respiratory problems including asthma, which afflicts 13 million Americans.
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