What chemical was banned in 1979?

The chemical that was banned in 1979 is polychlorinated biphenyls, commonly referred to as PCBs. PCBs were widely used in various industries for their chemical stability and insulating properties, particularly in electrical equipment. However, they were found to be toxic and environmentally persistent, leading to significant health risks, including cancer and other harmful effects on the immune and reproductive systems.

The ban in 1979 was part of a broader recognition of the need to regulate chemicals that pose risks to public health and the environment. EPA regulations prohibited the manufacture and use of PCBs due to their long-term effects on human health and the environment. This move was crucial for advancing environmental protection and public safety efforts.

While other chemicals listed have also faced severe restrictions or bans at different times, the specific ban on PCBs in 1979 is notable and highlights the regulatory actions taken to address the dangers of certain industrial chemicals.