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Clean Air Act effectively decreasing air pollution: study

Thursday, April 25, 2013
Smog from an inversion hangs over the Utah State Capitol Wednesday, Jan. 23, 2013, in Salt Lake City. The U.S. Environmental Protection Agency has singled out the greater Salt Lake region as having the nations worst air for much of January, when an icy fog smothers mountain valleys for days or weeks at a time and traps lung-busting soot.

Smog from an inversion hangs over the Utah State Capitol Wednesday, Jan. 23, 2013, in Salt Lake City. The U.S. Environmental Protection Agency has singled out the greater Salt Lake region as having the nation's worst air for much of January, when an icy fog smothers mountain valleys for days or weeks at a time and traps lung-busting soot. (AP Photo / Rick Bowmer)

America's air is getting cleaner, according to a new study.

The American Lung Association's annual "State of the Air" report is based on the Environmental Protection Agency's findings for 2009 through 2011.

The report shows that the three types of air pollution tracked-ozone, short-term and year-round particle pollution- have all declined.

The American Lung Association credits the Clean Air Act with reducing pollution levels.

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