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In page Toxaphene:

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The first recorded usage of toxaphene was in 1966 in the United States,[citation needed] and by the early to mid 1970s, toxaphene was the United States' most heavily used pesticide. Over 34 million pounds of toxaphene were used annually from 1966 to 1976. As a result of Environmental Protection Agency restrictions, annual toxaphene usage fell to 6.6 million pounds in 1982. In 1990, the EPA banned all usage of toxaphene in the United States.[2] Toxaphene is still used in countries outside the United States but much of this usage has been undocumented.[3] Between 1970 and 1995, global usage of toxaphene was estimated to be 670 million kilograms (1.5 billion pounds).[2]