 After the Canadian Supreme Court recognized that indigenous rights and treaty rights were not extinguished, a process was begun to resolve land claims and treaty rights and is ongoing today.In 1970, severe mercury poisoning, called Ontario Minamata disease, was discovered among Asubpeeschoseewagong First Nation and Wabaseemoong Independent Nations people, who lived near Dryden, Ontario.There was extensive mercury pollution caused by Dryden Chemicals Company's waste water effluent in the Wabigoon-English River system.