(March 3, 2022, 12:30 PM EST) -- DOYLESTOWN, Pa. — The Bucks County, Pa., district attorney on Feb. 28 sued 3M Co., E.I. du Pont de Nemours & Co. and others in Pennsylvania state court seeking damages for the remediation of per- and polyfluoroalkyl substances (PFAS) in groundwater and soil, arguing that the companies knew or should have known that PFAS is toxic....