ExxonKnews
August 4, 2025
Former fossil fuel industry scientists are increasingly speaking out about how oil executives covered up their operations’ harm to the climate. Their testimony has helped fuel a public reckoning and lawsuits.
Kris Hansen is now working to shed similar light on her experiences working as a chemist for 3M, a company that has manufactured a host of products containing toxic “forever chemicals” known as PFAS. In an in-depth investigation by ProPublica journalist Sharon Lerner, Hansen revealed how the company buried and undermined her research in the late 1990s, which showed conclusively that the chemicals 3M was using — PFOS, a type of PFAS — had become ubiquitous in human blood.
