Ottawa River drainage basin
The Ottawa River drainage basin is the drainage basin in northern North America where surface water empties into the Ottawa River and adjoining waters. Spanning an area of about , it is the 12th largest drainage basin in Canada, occupying the Canadian provinces of Ontario and Quebec. It accounts for about 11% of the total Saint Lawrence River drainage area.
Tar Sands Healing Walk
Canada is home to two of the three largest dams in the world. They are used to hold back toxic sludge from the oil sands. 11 million litres of toxic wastewater seep out of the tailing pits into the boreal forest and Athabasca river every day. That is 4 billion litres a year. Air pollutant guidelines in Alberta are less stringent than international standards. Despite that, air quality objectives were exceeded 1,556 times in 2009, up from 47 times in 2004.