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Historic Nitrate Levels Still Plague U.S. Rivers https://t.co/L1nBgMgrkP https://t.co/qocrEgltgu
Historic Nitrate Levels Still Plague U.S. Rivers https://t.co/L1nBgMgrkP https://t.co/qocrEgltgu
Historic Nitrate Levels Still Plague U.S. Rivers https://t.co/L1nBgMgrkP
RT @WaterWired: New @USGS Study—U.S. Rivers Show Few Signs of Improvement from Historic Nitrate Increases https://t.co/XtBOzCkGlm https://t…
@USGS study provides glimpse into how nitrate levels in 22 large rivershave changed over the last 65 years. https://t.co/WK4HQn2euu