Internal studies and other documents show that 3M knew by the 1970s that PFOA and PFOS were toxic and accumulating in people's blood.
IJERPH, Free Full-Text
Summary, Guidance on PFAS Exposure, Testing, and Clinical Follow-Up
Illinois knew about 3M chemical pollution but failed to take action, investigation finds
Mapping PFAS Chemical Contamination at 206 U.S. Military Sites
Perfluorooctanoic acid - Wikipedia
3M polluted drinking water with PFAS for decades. Will it have to pay for the clean up?
Per- and polyfluoroalkyl substances - Wikipedia
The Devil We Know - Wikipedia
Chemical giant 3M agrees to pay $12.5 billion after allegedly letting toxic 'forever chemicals' seep into our drinking water
Химическая корпорация 3M согласилась выплатить США $12,5 млрд / Хабр
Industry Cites Problematic Pro-PFAS Study on Cancer Patients
3M Knew About the Harms of PFOA and PFOS
3M to cease making and using dangerous 'forever chemicals' - The Washington Post