PennEnvironment Clean air. Clean water. Open spaces. Of the largest metropolitan areas, Pittsburgh, Pennsylvania experienced the most days with spikes in fine particle pollution, recording seven exceedances on seven different days. The Riverside-San Bernardino-Ontario metropolitan area in California ranked second among the largest metropolitan areas, recording 14 exceedances on six different days.
Friday, January 20, 2006
Pittsburgh's Air Quality is still lagging
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