Banned PCB chemicals are still severely harming the animals – but Arctic could be a refuge
At least half of the world’s killer whale populations are doomed to extinction due to toxic and persistent pollution of the oceans, according to a major new study.
Although the poisonous chemicals, PCBs, have been banned for decades, they are still leaking into the seas. They become concentrated up the food chain; as a result, killer whales, the top predators, are the most contaminated animals on the planet. Worse, their fat-rich milk passes on very high doses to their newborn calves.
Continue reading...from The Guardian https://ift.tt/2xVa9Fg
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