https://www.theguardian.com/commentisfree/2021/jul/21/toxic-forever-chemicals-pfas-fracking https://www.theguardian.com/commentisfree/2021/jul/21/toxic-... PFA

https://www.theguardian.com/commentisfree/2021/jul/21/toxic-forever-chemicals-pfas-fracking https://www.theguardian.com/commentisfree/2021/jul/21/toxic-... PFAS stay in the environment and are harmful to humans.