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What are PCBs?
Polychlorinated biphenyls (PCBs) are human-made organic chemicals that were manufactured for a half-century until they were banned in 1979. Because they are non-flammable, chemically stable, have a high boiling point and provide good electrical insulation, PCBs were used widely in electrical, heat transfer, and hydraulic equipment; as plasticizers in paints, plastics, and rubber products; in pigments, dyes, and carbonless copy paper; and many other industrial applications.
People exposed to high concentrations of PCBs and their more hazardous forms, as in fish fat, can experience adverse health effects. PCBs are a probable human carcinogen and have serious non-cancer health impacts in animals, affecting the immune system, reproductive system, nervous system and endocrine system.
Source: U.S. Environmental Protection Agency
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