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Supertopics:
Particular Water Pollutants
Dead Zones in Waterways from Agricultural Runoff
Fertilizer Problems
Nitrites and Nitrates

Nitrate Water Pollution from Agricultural Runoff

Subtopics:
webFrancis Thicke, Margaret Smith...Des Moines Register2015-12-24
webJosh FunkAssociated Press2015-08-18
webSara RubinAl Jazeera2014-12-25