Talk:Air pollution: Difference between revisions

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imported>Robert Badgett
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imported>Daniel Mietchen
 
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== 40 years of the US Clean Air Act ==
For an intro, see [http://www.treehugger.com/files/2010/09/clean-air-act-40th-birthday-epa.php here]. --[[User:Daniel Mietchen|Daniel Mietchen]] 19:05, 17 September 2010 (UTC)

Latest revision as of 13:05, 17 September 2010

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 Definition:  The presence of contaminants or pollutant substances in the air (air pollutants) that interfere with human health or welfare, or produce other harmful environmental effects. [d] [e]
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40 years of the US Clean Air Act

For an intro, see here. --Daniel Mietchen 19:05, 17 September 2010 (UTC)

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