Photos of Canada often show the Great Lakes, expanses of wetlands and scenic rivers. The country is described as a water-rich nation, and it is, with seven per cent of the world’s renewable freshwater supply. However, freshwater sources are far from endless. Many of Canada’s 25 watersheds are under threat from pollution, habitat degradation, water overuse and invasive species. For example, more than half of Canada’s population lives within the Great Lakes watershed, Ottawa basin and St. Lawrence basin, which face multiple threats that degrade water quality and undermine the ability of freshwater ecosystems to keep functioning. Curtis Creek, one of the tributaries within the Columbia Basin, B.C.