> The WHO’s cancer division (IARC - International Agency for Research on Cancer)
IARC is only nominally under WHO. It is a weird French agency founded by some French activists and politicians in the 1960's.
They use a 5 class classification
Group 1: The agent is carcinogenic to humans.
Group 2A: The agent is probably carcinogenic to humans.
Group 2B: The agent is possibly carcinogenic to humans.
Group 3: The agent is not classifiable as to its carcinogenicity to humans.
Group 4: The agent is probably not carcinogenic to humans.
But out of the 1042 chemicals and things they have classified, none are in Group 4. (Historically, there once was one single chemical in Group 4, but they have reclassified it.)
For IARC, everything is either at least possibly carcinogenic, or there is insufficient evidence (Group 3) to yet declare it carcinogenic.
Also:
"In 2019 IARC was accused of cooperation with "toxic tort law firms" who make profit of suing companies for compensation for alleged health issues based on IARC classification. IARC was accused from hiding conflicts of interest impacting a few invited experts, especially those related to large-scale cash flows from US law firms."
https://en.wikipedia.org/wiki/International_Agency_for_Resea...
Many countries have perfectly capable chemicals agencies and food safety agencies, who are much more reliable than the IARC.