1970 Minamata disease outbreak in Ontario

Minamata disease is a neurological syndrome caused by severe mercury poisoning, normally as a result of pollution. A toxicological outbreak occurred in the Canadian province of Ontario, in 1970, and severely affected two First Nation communities in Northwestern Ontario following consumption of local fish contaminated with mercury, and one First Nation in Southern Ontario due to illegal disposal of industrial chemical waste.

Source: Wikipedia — 1970 Minamata disease outbreak in Ontario (CC BY-SA 4.0)