Most dry cleaners use a solvent called perchloroethylene, a known carcinogen in animals. You wouldn’t want it next to your skin, and when the chemical isn’t disposed of properly, it can seep into water supplies. But there’s hope for that wine-stained shirt. Some cleaners are switching to a harmless silicone solvent that biodegrades. Visit greenearthcleaning.com to find your nearest nontoxic cleaner.