More research needed on underwater oil dispersant use

More research is needed to understand the long-term effects of oil dispersants, especially considering their underwater use, experts and lawmakers said at a U.S. Senate committee hearing Wednesday.

More research is needed to understand the long-term effects of oil dispersants, especially considering their underwater use, experts and lawmakers said at a U.S. Senate committee hearing Wednesday.

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Of the approximately 1.8 million gallons of dispersants used in the gulf spill, about 42 percent were applied below the surface at the site of the leak, said Ronald Kendall, chairman of the department of environmental toxicology at Texas Tech University.

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