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Great Lakes Areas of Concern are designated geographic areas within the Great Lakes Basin that show severe environmental degradation. There are a total of 43 areas of concern within the Great Lakes, 26 being in the U.S., 17 in Canada, with five shared by the two countries. The Great Lakes, the largest system of fresh water lakes in the world, are shared by the United States and Canada. They make up 95% of the surface freshwater in the contiguous United States and have 10,000 miles of coastline (including connecting channels, mainland and islands)—more than the contiguous United States' Pacific and Atlantic coastlines combined. The lakes are a system of transport and shipping, as well as a place of recreation. == Description of an AOC == An Area of Concern must have at least "one beneficial use impairment which means that it has undergone a change in its chemical, physical, or biological integrity of a water body." These include: *restrictions on fish and wildlife consumption *tainting of fish and wildlife flavor *degradation of fish and wildlife populations *fish tumors or other deformities *bird or animal deformities or reproduction problems *degradation of benthos *restrictions on dredging activities *eutrophication or undesirable algae *drinking water restrictions, or taste and odor problems *beach closings *degradation of aesthetics *added costs to agriculture or industry *degradation of phytoplankton and zooplankton *loss of fish and wildlife habitat 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Great Lakes Areas of Concern」の詳細全文を読む スポンサード リンク
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