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. 2013 Jun 1;121(6):a182–a189. doi: 10.1289/ehp.121-a182

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graphic file with name ehp.121-a182.g009.jpg — Hog waste being applied to sprayfields near Warsaw, North Carolina. Nutrients, pathogens, heavy metals, and other potentially toxic agents in the waste can make their way into local watersheds, with implications for drinking water and aquatic ecosystems.

© 2013 Donn Young Photography