by Mark Patrick Taylor, Brenton Hamdorf, Bruce Lanphear, Miri Forbes, Robin Gasiorowski and Yordanka Krastev, The Conversation Credit: Shutterstock You might have heard of PFAS, a synthetic chemical found in certain legacy firefighting foams, non-stick pans, carpets, clothes and stain- or water-resistant materials and paints. PFAS stands for “per- and poly-fluorinated alkyl substances.” These molecules,...