DuPont and their contamination of essentially all life on earth with the chemical PFOA C8 (Perfluorooctanoic acid) that causes cancer and other diseases. During production of the chemical they dumped it into the water supply where it then spread globally.

This documentary really puts things into perspective —it’s crazy. I highly suggest you watch it to understand just how significant their impact was.

https://youtu.be/6veeTrdEyek