Christopher Lehmann and David Gay, University of Illinois at Urbana-Champaign (IMAGE)

University of Illinois at Urbana-Champaign, News Bureau

Christopher Lehmann and David Gay, University of Illinois at Urbana-Champaign

Caption

Researchers Christopher Lehmann, left, and David Gay completed a 25-year study of acidic pollutants in rainwater collected across the US and found that both frequency and concentration of acid rainfall has decreased.

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L. Brian Stauffer

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