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Nobody but die hard apologists expected the oil to really have disappeared. Corexit 9500 plus oil is no more toxic than oil alone (this is why BP switched from the more toxic Corexit 9527 at the urging of the EPA); and the evidence suggests that the unknown effects of dispersal of oil into the water column is likely less than the catastrophic damage to wetlands that would have occurred had oil been allowed to wash ashore. That's why as much dispersant as possible was used, now we have to figure out what to do from here.
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