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July 18th, 2017

California votes to regulate toxic chemical that could be in water nationwide

On Tuesday California will vote on whether to regulate a chemical that some experts say is one of the most powerful cancer-causing agents in the world. In the latest edition of our special series “Undercovered,” NBC News investigative correspondent Ronan Farrow heads to a community where residents says they’ve been exposed to the threat for years. More on this story here.

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