The Mississippi River Basin comprises 40% of the land area of the United States and collects runoff from The Appalachian Trail on the East to the Rockies on the West. This results in one of the most polluted areas in the world in the Dead Zone of the Gulf of Mexico.
To learn more, check out: http://www.sciencedaily.com/releases/2009/06/090618124956.htm
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Hypoxic zone is the biggest its ever been in 2009! Mississippi River is world's biggest source of pollution thanks to nonpoint source pollution.
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