The Great Lakes—the GREAT Lakes! Containing one-fifth of the worldʼs liquid freshwaters, the Great Lakes of North America are clearly visible from space. By definition, they are coastal waters of the United States, and form part of the international border with our North American partner, Canada. Individually and collectively, the lakes rank amongst the largest lakes in the world: Lake Superior, with its surface area of almost 83,500 square kilometers is the largest freshwater lake by area, and the Great Lakes system is the largest continuous mass of freshwater on the planet in terms of both area (nearly 250,000 square kilometers—more than one-third the size of the state of Texas!) and volume (about 25,000 cubic kilometers).
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