Which of the following statements about PCB oils is correct?

Polychlorinated biphenyls (PCBs) are a group of human-made organic chemicals that have been widely used in electrical equipment, like transformers and capacitors, for their insulating and cooling properties. The correct statement about PCB oils being both carcinogenic and poison-gas producing highlights the significant health risks associated with these substances.

PCBs are known to be carcinogenic, meaning they can contribute to the development of cancer in humans. Studies have shown that exposure to PCBs can lead to various types of cancer, particularly skin, liver, and possibly other organ cancers. This makes awareness and proper handling of PCB-containing materials essential for anyone working in fields where they might encounter these substances.

Additionally, when PCBs are subjected to heat or combustion, they can decompose into other chemicals that may produce toxic gases. This poses a risk not just in terms of direct exposure, but also during any incidents where PCB equipment fails or is improperly disposed of, potentially leading to the release of harmful substances into the environment.

Understanding these facts about PCBs underscores the importance of strict regulations and safety protocols surrounding their use, handling, and disposal to protect human health and the environment.