ABSTRACT
The polychlorinated biphenyls (PCBs) and polybrominated biphenyls (PBBs) are industrial chemicals that do not occur naturally in the environment. The properties, uses, and toxicology of the PCBs are described in detail in Safe (1984), Robertson and Hansen (2001), and Environmental Health Criteria 140. PBBs are described in Safe (1984) and Environmental Health Criteria 152.
