In Cleaning Oiled Marshlands, A Sea Of Unknowns

Scientists have begun cleanup efforts in some of the regions that were most affected by oil from the BP spill last April. They're trying to establish which methods ? if any ? work best.

Source: http://www.npr.org/2011/04/20/135571426/in-cleaning-oiled-marshlands-a-sea-of-unknowns?ft=1&f=1007

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