In the 1930’s DuPont, a U.S. firm, invented and began to market a substance called Teflon. Teflon is used today primarily as a non-stick coating for pots, pans and other cookware, though Teflon also has applications as a coating for textile based products such as clothes, apparel, carpeting and furniture. When manufacturing Teflon a chemical called perfluorooctanioc acid, or PFOA…