Killer Whale Populations At Risk from Toxic Chemicals

A paper in the Sept. 28 issue of Science says killer whales are at great risk, but not from climate change, loss of habitat or loss of their prey. It will be due to something that sounds very 1970s – PCB, or polychlorinated biphenyl. PCBs are human-made chemicals used for making plastics, electronics, lubricants, heat transformers and other materials and technology. In the late 1970s, studies showed the harmful effects of PCB on humans and on wildlife, such as birds, otters and seals. According to a 2017 paper, killer whale populations off the coast of the most industrialized parts of Europe are close to extinction. >click to read<12:02

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