Polychlorinated biphenyls (PCB's):
A group of toxic, carcinogenic organic compounds containing more than one chlorine atom. PCB's were used in the manufacture of plastics and as insulating fluids in electrical transformers and capacitors. They behave much like DDT in the environment in that they are very stable compounds and are also fatsoluble; therefore, they accumulate in everhigher concentrations as they move up the food chain. The use of PCB's was banned in the United States in 1979.. PCB's were used in the manufacture of plastics and as insulating fluids in electrical transformers and capacitors. They behave much like DDT in the environment in that they are very stable compounds and are also fatsoluble; therefore, they accumulate in everhigher concentrations as they move up the food chain. The use of PCB's was banned in the United States in 1979.
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