Top Polluted U.S. Cities With the Worst Air

The air that most Americans breathe may not be as clean as they think -- depending on where they live, at least. Roughly 60 percent of Americans live in areas where air pollution has reached unhealthy levels that can make people sick, suggests the 2009 State of the Air report released today by the American Lung Association. The 2009 report was based on data collected at some 900 monitoring sites across the country during a three-year period from 2005 through 2007. Researchers measured the air...Full Story
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