The toxins of our past still threaten the future of killer whales


A baby killer whale leaps over its mother killer whale.
Animals

The EPA banned PCB's 40 years ago, but they're not going anywhere.

A family of chemicals banned more than 30 years ago is still making it difficult for killer whales around the world to have babies.
via Popular Science "https://ift.tt/2y4UC6w"

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