Chemical industry used big tobacco’s tactics to conceal evidence of PFAS risks

DuPont or 3M scientists discovered PFAS toxicity internally, but did not publish findings or report them to the EPA, study says

In 1953, a paper developed for cigarette maker RJ Reynolds detailed possible cancer-causing agents in tobacco, but the document would remain hidden from public view for decades. In the interim, the industry told the public: We don't accept the idea that there are harmful agents in tobacco."

The chemical industry, it seemed, took note. Just a few years later, DuPont scientists found PFAS enlarged lab rats' livers and likely caused birth defects in workers. Still, the company told its employees the cancer-linked compounds are about as toxic as table salt".