The natural/synthetic distinction is arbitrary, but you are both right. The correct approach would be to get more granular and specify that we only want to eli

The natural/synthetic distinction is arbitrary, but you are both right. The correct approach would be to get more granular and specify that we only want to elininate chemicals, whether natural or synthetic, that do not break down or are toxic. If you find a natural source of PFAS ("forever chemicals") then it isn't any better.