The dangers of 'forever chemicals' PFAs are a category of manmade carcinogenic chemicals that do not break down in the environment and they accumulate in wildlife, plants and humans. PFAs are used in many household items like nonstick cookware, microwave popcorn bags, pizza boxes, windshield fluid and carpets. They are also in the water — groundwater and drinking water. And over time, they accumulate in fish and livestock, meaning they are in the food chain. All of these sources cause them to accumulate in the human body. | |