Map : What is a Dead Zone? oxygen concentration is so low that animals can suffocate, …..and as a result are often called “dead zones.” [This Map]… shows how runoff from farms (green areas) and cities (red areas) drains into the Mississippi.

Map Info & Chart : What is a Dead Zone? oxygen concentration is so low that animals can suffocate, …..and as a result are often called “dead zones.” [This Map]… shows how runoff from farms (green areas) and cities (red areas) drains into the Mississippi.

What is a Dead Zone? oxygen concentration is so low that animals can suffocate, …..and as a result are often called “dead zones.” [This Map]… shows how runoff from farms (green areas) and cities (red areas) drains into the Mississippi.

By KatrineTee

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