News: National Geographic reports BP oil under sand

During a series of digs, oil patties and tarballs were found just beneath beaches dirtied by the Gulf of Mexico oil spill. The discoveries suggest that toxic oil lies hidden under even “clean” patches of beaches along the U.S. Gulf Coast—and that oil-spill cleanup crews are only scratching the surface. Read more.

Also Long-lasting, hidden oil from the Gulf spill poses risk, experts say.

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