pfas, pfos and pfoa dangerous synthetic substances used in products and materials

pfas pfass concept concepts pollutants pollution polyfluoroalkyl pfoa pfos perfluorooctanesulfonic perfluorooctanoic contamination organofluorine chemicals attention environmental damage issues illness carcinogen water repellent chemical danger warning synthetic cancer toxic waterproof impermeable waterresistant rainproof compounds fluorinated substances fluorine organic environment health exposure risk dangerous products fluorochemicals carcinogenic biochemistry pollutant microbiology chemistry hazard used materials their enhanced water-resistant properties