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St. Paul, Minn.

Long-term environmental implications of the gulf oil spill

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BP oil spill
The shadow of a helicopter passes over oil from the Deepwater Horizon oil spill in waters less than ten miles off the coast of Grand Isle, La., Monday, June 28, 2010.
AP Photo/Gregory Bull
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BP oil spill
The shadow of a helicopter passes over oil from the Deepwater Horizon oil spill in waters less than ten miles off the coast of Grand Isle, La., Monday, June 28, 2010.
AP Photo/Gregory Bull