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Feb. 9, 2010 - PERC really is a "likely human carcinogen," the National Academy of Sciences says.
PERC is a chemical known as perchloroethylene or tetrachloroethylene. It's the solvent used by about 85% of U.S. dry cleaners, but is also used as a metal degreaser and in the production of many other chemicals.
PERC is found in the air, in drinking water, and in soil. It can be detected in most people's blood, as well as in breast milk. What's the risk?
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