Oceanic Dead Zones

 

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As the Mississippi River ejects spring rains into the Gulf of Mexico, a
dead zone develops, in which fish and other marine life flee or die.
The zone will be 6,000 square miles. Researchers say fertilizer is to
blame.

 

The causes of the dead zone, and similar dead zones around the world, are not completely understood. But in two separate studies last year, agricultural runoff was blamed.

Great summary HERE

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