Largely banned industrial chemicals could wipe out killer whales, study warns

Mongabay
Oct 1, 2018, 1:06 pm314 pts
A few decades ago, most countries phased out the manufacture and use of a highly toxic group of industrial chemicals called polychlorinated biphenyls, or PCBs. But the dangers of these largely banned pollutants still linger on. New research shows that PCBs remain a major threat to killer whales around the…

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