Polychlorinated biphenyls (PCBs) are a group of man-made organic chemicals that were manufactured from 1929 to 1979. Due to their non-flammability, chemical stability, high boiling point, and electrical insulating properties, they were used in hundreds of industrial and commercial applications.
Lack of maintenance of older electrical equipment, illegal dumping of PCB waste and burning of PCB equipment in landfills may expose us to these chemicals by contaminating our food sources and air.