NPR's Ina Jaffe reports on the Environmental Protection Agency's experimental attempt to cover an undersea deposit of toxic DDT off the coast of California, with a fresh layer of sediment. An estimated 110 Tons of the poisonous pesticide is located on 17 square miles of ocean floor. Between 1947 and 1971, Montrose Chemical dumped the DDT into the sewer system, which discharged it into the ocean.
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