A community that has lived along the English-Wabigoon River system for thousands of years is being poisoned by mercury dumped into the waters by a paper mill decades ago.
The toxic effects of mercury dumped in a river in Canada continue to harm indigenous communities five decades on.
A new report has linked contaminated fish to adverse effects on the people of the Grassy Narrows First Nation.
Many are suffering from learning disabilities, experiencing grave health problems - and even dying prematurely.
Al Jazeera's Daniel Lak reports.