AIHA has released a white paper on exposure to polychlorinated biphenyls (PCBs) in construction environments. "White Paper on PCBs in the Built Environment," explains what PCBs are and examines the exposure potential for occupants and personnel in such environments. According to AIHA, the paper also "identifies gaps in the current knowledge base that would help occupational and environmental health professionals to better understand the public health risk from PCBs in building materials."