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The 15 most toxic places to live

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Photo: Yuri Kadobnov/AFP/Getty Images

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Lake Karachay, Russia

According to a report by the Worldwatch Institute on nuclear waste, Karachay is the most polluted spot on Earth. It was used by the Soviet Union as a nuclear dumping site, and now the radiation level here is so high that it's sufficient to give a lethal dose after just an hour of exposure.