What Causes Ocean “Dead Zones” – Scientific American

Heavy Fertilizer Use May Transform Lakes for Centuries, Study Suggests – Scientific American

Fertilizer Runoff Overwhelms Streams and Rivers–Creating Vast “Dead Zones” – Scientific American

Sour Showers: Acid Rain Returns–This Time It Is Caused by Nitrogen Emissions -Scientific American

Carbon Dioxide Emissions – United States Environmental Protection Agency

Benefits of Healthy Watersheds –¬†United States Environmental Protection Agency

The Not-So-Mysterious Loss of Salt Marshes and Ecosystem Services – Scientific American