Perfluoroalkyl, polyfluoroalkyl (PFAS), and perfluorooctane sulfonate (PFOS) are man-made chemicals that resist breakdown in the environment and the bodies of people and critters, hence the moniker forever chemicals.
They’ve been widely used since the 1940s in a variety of products including fire extinguishing foam, chrome plating, electronics, textile and paper manufacturers, water-repellents, non-stick products, paints, sealants, even some personal care products, and more. The problem is they now seem to be widespread in the environment, too.
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