Poison lurking in schools | WBEZ
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Poison lurking in schools

Across the country, tens of thousands of public schools could be contaminated with toxic polychlorinated biphenyls – a compound more commonly known as PCBs, which were used mainly in the caulking of windows. On this hour of Reveal, we take a closer look at this sleeper chemical that was banned in 1979 but still poses a serious health risk to kids today.

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