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A new study shows that dispersants used to break up oil in the Gulf of Mexico arent anymore toxic to aquatic life than the oil by itself.
The Environmental Protection Agency, says tests also show that when mixed with oil, the solvents being used are no more or less toxic than other alternatives.
The test results were released as the Obama administration defended itself, against assertions that officials allowed oil giant BP to use excessive amounts of chemical dispersants whose threat to sea life remains unknown.
Congressional investigators, say the Coast Guard routinely approved BP's requests to use large amounts of the chemical, despite federal directives to use it sparingly.