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New accord targets long-lived pollutants

This week, negotiators from the United States and 121 other nations agreed to ban or phase out some of the world's most notorious chemicals. The 12 pollutants are renowned for their toxicity, long life, and propensity for leapfrogging around the world—often for decades.

The targeted compounds include dioxins and structurally related furans; polychlorinated biphenyls (PCBs); and the pesticides aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, hexachlorobenzene, mirex, and toxaphene.

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