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Great Lakes The Great Lakes are a group of five large freshwater lakes in North America that are interconnected by natural and artificial channels.
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They are from east to West, Lake Ontario, Lake Erie, Lake Huron, Lake MI, and Lake Superior.
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Most of them, except Lake MI, which lies entirely within the United States, form part of the border between the United States and Canada.
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The Great Lakes are bordered by the Canadian province of Ontario and by 8 U.S.
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states, including from West to east, Wisconsin, Minnesota, Illinois, Indiana, Ohio, Michigan, Pennsylvania, and New York.
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Large cities like Chicago, Detroit, Cleveland, and Toronto lie on the shores of the Great Lakes system.
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The Great Lakes system, with a combined surface area of 244,100 square kilometers, holds about 20% of the world's fresh surface water.
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Lake elevations decrease to the east and South.
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Lake Superior, the largest lake at 82,100 square kilometers, is also the largest freshwater lake in the world.
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It's outlet is the Saint Mary's River, which enters Lake Huron after falling about 7 meters over a series of Rapids.
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Lake Huron and Lake MI lie at the same elevation.
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Water flows from Lake MI to Lake Huron.
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Lake MI is deeper than Lake Huron, but the latter is larger in area at 59,600 square kilometers.
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Lake Huron drains into the Saint Clair River, which falls about 3 meters between Lake Huron and the small, shallow Mason of Lake Saint Clair.
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Lake Saint Clair is connected to Lake Erie by the Detroit River.
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At its northeast end, Lake Erie empties into the Niagara River, which drops 99 meters as it flows N to Lake Ontario, which is the smallest of the Great Lakes at 19,000 and 10 square kilometers.
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Lake Ontario is linked with the Atlantic Ocean via the Saint Lawrence River.
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The Great Lakes, interconnected by rivers, straits and canals, are a natural resource of tremendous significance in North America.
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They serve as the focus of the industrial heartland of the continent and together form one of the world's busiest shipping arteries.
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The lakes also form an important recreational resource, with about 17,000 kilometers of shoreline rich sport fisheries and numerous beaches and marinas.