For anyone interested, below [also attached as a pdf file] is a publication described by Phil Guzelian that PFOA at varying doses may benefit patients with terminal cancer, while having undesirable side-effects at other doses. As far as these PFASs, desired vs undesired effects, let’s say “the jury is still out.”
And below that is a note with references from John Droz, Jr. that solar panels contribute to PFAS contamination of groundwater, and everyone knows (from seeing them) that solar panels are becoming popular all over the western world (even though — when one considers manufacturing, maintenance and disposal — the so-called ‘carbon footprint’ of solar panels is considerably greater than that of fossil fuels, per energy output equivalent).