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Brown cloud back above Phoenix as temps drop

Date: 11/14/2008PHOENIX (AP) _ Cooler weather has created ideal conditions for the return of the seasonal brown pollution cloud over the Phoenix metropolitan area.Visibility was rated as poor Thursday by the Arizona Department of Environmental…

Study: Calif dirty air kills more than car crashes

Date: 11/13/2008By TRACIE CONEAssociated Press WriterFRESNO, Calif. (AP) _ Lowering air pollution in Southern California and the San Joaquin Valley would save more lives annually than ending all motor vehicle fatalities in the two regions, according…