Study sees cities’ air quality worsening

 Cleveland's industrial valley provides a backdrop for vehicle traffic on Interstate 90 through the city Thursday, Sept. 13, 2007, in Cleveland. A study released Thursday predicts more bad air days in the summer for Cleveland, Columbus and eight other eastern U.S. cities if global warming continues unabated. (AP Photo/Mark Duncan)AP – A study released Thursday predicts more bad air days in the summer for Cleveland, Columbus and eight other eastern U.S. cities if global warming continues unabated.

Study sees cities’ air quality worsening (AP)

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