Polychlorinated biphenyls (PCBS)

Polychlorinated biphenyls are a group of 209 different man-made chemicals differentiated by their number of chlorine atoms. They were widely used and improperly disposed during the 1940s through the 1970s, when it was finally banned, and were primarily used as hydraulic fluids, plasticizers, adhesives, fire retardants, pesticide extenders, inks, lubricants, and others. Introduced to water supplies through runoff from landfills, discharge from chemical factories, and especially from contaminated rivers, such as the Hudson River. It has been linked to multiple conditions since it accumulates in the body through time, including, thymus gland problems; immune deficiencies; skin changes; reproductive system, nervous system, neurological and liver damages; important birth defects, and has also been associated with an increased risk of causing cancer.

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