The article discusses the emergence of polychlorinated biphenyls (PCB). Manufactured from the waste products of the crude oil refining process and a range of chlorinated chemicals, these oily, syrupy liquids had a multitude of uses and have been described as being as near perfect as any industrial chemical can be. PCBs conduct heat but not electricity and they are not water soluble.

Banned toxic chemicals that can cause cancer are sneaking into

Nations finally draft a treaty to combat the use of toxic chemicals like DDT and PCBs, which are known for their damning health effects