These so-called perfluorochemicals are toxic to humans at single-digit parts per trillion.
If you live in the US, chances are your blood already contains these chemicals at 4,000 ppt or greater (four thousand parts per trillion is the nationwide average).
> These so-called perfluorochemicals are toxic to humans at single-digit parts per trillion.
No, they aren't. At least, not in the way you're interpreting the word "toxic".
> If you live in the US, chances are your blood already contains these chemicals at 4,000 ppt or greater
The fact that you're telling me that I'm currently thriving with 1000x the "toxic" dose you just quoted should tell you that at least one of the statements is exaggerated.
Again, there are people out there who will tell you that any exposure to certain chemicals is "toxic". These people are not worth listening to.
If you live in the US, chances are your blood already contains these chemicals at 4,000 ppt or greater (four thousand parts per trillion is the nationwide average).