Link to original research article (which should actually be required to be included in every publication that includes the words: "new research shows X")
https://pubs.acs.org/doi/10.10...
short explanation - they're in the air and so they're everywhere.
"Until recently, the common belief was that PFAAs would eventually wash off into the oceans where they would stay to be diluted over the time scale of decades. (52) A recent study, (53) however, has provided evidence that certain PFAS, notably the long-chain PFAAs, which include the 4 PFAAs included in EFSA’s TWI, can be significantly enriched on sea spray aerosols (SSA) and transported in the atmosphere back to shore where they will be deposited and contaminate freshwaters, drinking waters and surface soils.
This continual global cycling of PFAAs in the hydrosphere will lead to the continued exceedance of the above-mentioned guidelines. This finding is particularly worrying because (1) guideline values based on biological effects have continually decreased (20) and may not yet have reached the bottom as more scientific evidence emerges, (2) guidelines are currently based on only a few of the substances in the large PFAS class, (10) and (3) there is no evidence for the decline in environmental concentrations and thus environmentally derived exposures of PFAS. (54)"
Conclusion - even if you don't agree with us, this is a big problem, one that we haven't fully quantified, and a mistake that we continue to make despite a long history of making the same mistake in the past... i.e., we're dumb, short-sighted, and we never learn.
"Irrespective of whether or not one agrees with our conclusion that the planetary boundary for PFAS is exceeded, it is nevertheless highly problematic that everywhere on Earth where humans reside recently proposed health advisories cannot be achieved without large investment in advanced cleanup technology. Indeed, although PFOS and PFOA were phased out by one of the major manufacturers (3M) 20 years ago, it will take decades before levels in land-based water and precipitation approach low picogram per liter levels. Moreover, the problems associated with PFOS, PFOA, or 4 PFAAs are likely to be only the tip of the iceberg given that there are many thousands of PFAS in the class and the risks associated with most of them are unknown. (60) In view of the impacts of humanity’s chemical footprint on planetary health, it is of great importance to avoid further escalation of the problem of large-scale and long-term environmental and human exposure to PFAS by rapidly restricting uses of PFAS wherever possible. (61) Furthermore, as has been stated by ourselves (3) and others (7) before, society should not continually repeat the same mistakes with other persistent chemicals."
The planet, in the long run, will be just fine as planets go... but humanity is systematically destroying the only biome we can actually live in.