Geography 2011A/B Chapter Notes - Chapter -: Lake Ontario, Ice Dam, Detroit River
25 Nov 2015
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Document Summary
2009 canada-us glwqa modernize it to meet new challenges. 1972 agreement very successful: ddt and mercury declined, reduce algae producing phosphorus inputs, improve sewage treatment and phosphate detergent bands. Capacity of governments to enforce regulations decline. Rising doubt of governments willingness and ability. Commitments set forth slow, only 3 aocs removed over two decades. Great lakes face a new set of concerns, new toxic chemicals. Water cycle: evaporates -> rises until cool air -> condenses to clouds -> falls. Commitments on the great lakes include: protecting and restoring the natural heritage, taking aggressive approach to toxic substances, and adopting a zero-tolerance policy toward invasive species. Obama 2010 budget put lots of money toward cleaning water systems. Most changes in water levels are natural but some due to human activity. Lake erie water levels rose damaging homes, spring water levels drop too shallow to dock boats. Lake superior drains to lake huron via st. mary"s river.
