So not only are toxic chemicals going out of fashion, they are also turning out to be a financial disaster for the companies involved with them.

Two years ago, DuPont, and its spin-off Chemours, had to pay $671 million to settle several thousands of lawsuits connected to a leak of PFOA into local water supplies from a plant where it was used to make Teflon.

Last year, 3M – another producer of PFAS chemicals – had to pay $850 million to settle a similar case. But this was not the end of PFAS troubles for 3M. Earlier this year, four lawsuits alleging contamination of drinking water and other natural resources were filed against the company.