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        6-12

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        Part of QUEST
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        Mercury in San Francisco Bay | QUEST

        Learn about the potent neurotoxin that can cause serious illness, mercury, which has been flowing into the bay since the mining days of the Gold Rush era, in this video from QUEST produced by KQED. It has settled in the bay's mud and made its way up the food chain, endangering wildlife and making many fish unsafe to eat. Now a multi-billion-dollar plan aims to clean it up.

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