What Are PCBs and Why Are They Dangerous to Public Health?

Old electrical transformers containing PCBs

PCB, or polychlorinated biphenyls, were widely used in electrical equipment and industrial facilities from 1929 until the 1980s. Its insulating properties made PCB useful for cooling, heat transfer, and hydraulic equipment. PCBs were also found in paints, plasticizers, caulk, cable insulation, thermal insulation, pigments, dyes, and rubber products. Most commonly, polychlorinated biphenyls were put into […]