Study Sees Cities' Air Quality Worsening

By JOE MILICIA, Associated Press Writer, Space & Earth science / Environment

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.

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