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For an industry whose mission is cleaning, it might come as a shock to learn that the vast majority of dry cleaning businesses today rely on methods that are anything but. As the most commonly-used solvent in dry cleaning shops, Perchloroethylene -- or “PERC” as it’s known in industry parlance - is a volatile carcinogen that’s harmful to our health and our environment. In fact, dry cleaning workers and customers who routinely breathe excessive amounts of the solvent vapor or spill perc on their skin are at risk of developing health problems.