DuPont concealed decades-long chemical pollution linked to kidney cancer, testicular cancer, thyroid disease, high cholesterol, and ulcerative colitis

uPont understood that PFOA caused cancerous testicular, pancreatic and liver tumors in lab animals. One laboratory study suggested possible DNA damage from PFOA exposure, and a study of workers linked exposure with prostate cancer. DuPont at last hastened to develop an alternative to PFOA. An interoffice memo sent in 1993 announced that ‘‘for the first time, we have a viable candidate’’ that appeared to be less toxic and stayed in the body for a much shorter duration of time. Discussions were held at DuPont’s corporate headquarters to discuss switching to the new compound. DuPont decided against it. The risk was too great: Products manufactured with PFOA were an important part of DuPont’s business, worth $1 billion in annual profit.

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