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Great Lakes
The Great Lakes (Superior, Michigan, Huron, Erie, Ontario) are North America's five connected freshwater lakes, the largest fresh surface water system on earth, holding about one-fifth of the world's fresh surface water and supplying over 40 million people.
Great Lakes region
The Great Lakes region is the North American area around Lakes Superior, Michigan, Huron, Erie, and Ontario and their basin, spanning eight U.S. states and Ontario, holding about 21% of the world's surface fresh water and a $6 trillion economy.