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- Between 1947 and 1977, General Electric polluted the Hudson River by discharging polychlorinated biphenyls (PCBs) causing a range of harmful effects to wildlife and people who eat fish from the river. Other kinds of pollution, including mercury contamination and cities discharging untreated sewage, have also caused problems in the river. In response to this contamination, activists protested in various ways; for instance, musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. Environmental activism nationwide led to passage of the federal Clean Water Act in 1972 and the Toxic Substances Control Act of 1976. The federal government designated the contaminated portion of the river, 200 miles (320 km) long, as a Superfund site in 1984. Extensive remediation actions on the river began in the 1970s with the implementation of wastewater discharge permits and consequent reduction of wastewater discharges, and sediment removal operations, which have continued into the 21st century. Fish consumption advisories remain in effect. (en)
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