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Study: Mississippi River Overwhelmed by Agricultural Chemicals

Every spring a so-called "dead zone" develops in the Gulf of Mexico near the mouth of the Mississippi River. Spreading up to 13,600 square kilometers and extending all the way to the eastern Texas shoreline, the zone results from nitrogen-heavy river water pouring into the gulf, where it promotes the growth of algae. As the algae dies, it sinks to the bottom where it decomposes and depletes oxygen from the water, a condition called hypoxia that is deadly to fish and...

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