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PFAS, also known as “forever chemicals,” are a large group of synthetic chemicals that break down very slowly over time and are linked to harmful effects on human health. They’re used in a vast array of products, from pots and pans to computers and even dental floss. Laurel Schaider, senior scientist at the Silent Spring Institute in Massachusetts, studies the spread of PFAS chemicals in the drinking water and their effects on human health. She discussed ways that people can take steps to reduce