stop dangerous pfas - perfluoroalkyl and polyfluoroalkyl substances

biochemistry cancer carcinogen carcinogenic caution chemical chemicals chemistry compounds concept concepts contamination damage danger dangerous environment environmental exposure fluorinated fluorine fluorochemicals health icon impermeable issues microbiology organic organofluorine pfas pfass pfoa pfos pollutant pollutants pollution polyfluoroalkyl products rainproof repellent risk road safety sign stop substances synthetic toxic warning water waterproof waterresistant