Can you elaborate on this for me, I found the article confusing in its usage of C8 and Teflon (which seemed interchangeable as written?). What chemicals are used to produce Teflon which are harmful?
PTFE is stable and nontoxic at temperatures below about 250° celsius.
PFOA, a.k.a. C8, is a surfactant (“soap”) which was used in the polymerization of PTFE. (But also used for many other purposes, e.g. as an ingredient in carpet cleaners and fire-fighting foam.)
PFOA is a toxin and carcinogen which bioaccumulates and causes nasty problems for people exposed to large amounts of it.