Workers are cleaning a sea bird on May 4, as a large amount of sea birds and animals are threatened by the oil slick. So far, the emergency measures taken to contain the oil spill in the Gulf of Mexico have proven to have little effect. There are still about 5,000 barrels of oil leaking into the gulf. U.S. president Barack Obama called the oil spill a massive and potentially unprecedented environmental disaster. [163.com]
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