Decades ago, Kris Hansen showed 3M that its PFAS chemicals were in people’s bodies. Her bosses halted her work. As the EPA now forces the removal of the chemicals from drinking water, she wrestles with the secrets that 3M kept from her and the world.
Discovered during the Manhattan Project, these ‘waterproof’ chemicals bind to every living thing’s cells with only bad results. 3M knew since the late 70’s and has continued to manufacture enough to contaminate all the freshwater on Earth.