POL 203 Lecture Notes - Lecture 7: Eutrophication, Point Source Pollution, Water Pollution
17 Nov 2014
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Document Summary
Pol203 - politics of the environment - lecture 7: water and the great lakes. Essential for all life, difficult to exclude. It is often considered a subtractable good due to its overall scarcity in terms of fresh water. Due to its commons symptoms, conflict is almost always unavoidable. Canada is a very water rich nation. Only has two percent of the population with 23 percent of freshwater compared to others is quite the substantial ratio. Canada has 25 percent of the world"s wetlands, eight percent of its landmass is covered by freshwater lakes and rivers; hence, water is not distributed evenly in. Water use falls in three broad categories. Consumptive uses - water is removed from a system and then irrigated for use en masse. Withdrawal uses - water quantity taken is returned but quality is often degraded. In-stream uses - use of water in its natural location, includes fishing, tourism and hydroelectricity.
