PFAS (pronounced P-Fas) is the short name for a class of human-made chemicals known as per- and polyfluoroalkyl substances. PFAS chemicals are often called "forever chemicals" because they do not easily degrade in the environment or in the body, so they accumulate in both over time.[1] There are over 9,000 types of PFAS chemicals.[2] This article will explain where PFAS chemicals are found, why they are harmful, and how you can reduce your exposure to them.
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