Contact: Liz Ahlberg
eahlberg@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign

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.

Credit: L. Brian Stauffer

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