Firefighting foam left after a fire in Pennsylvania. These foams often contain PFAS chemicals that can contaminate water supplies.
Bastiaan Slabbers/NurPhoto via Getty Images
PFAS chemicals are toxic, widespread and persistent in the environment, and the federal government has been slow to regulate them. A scientist explains why evaluating them one by one isn’t working.
Mark Ruffalo as Robert Bilott, the ‘lawyer who became DuPont’s worst nightmare’.
Focus Features