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At Earth.com, our goal is to provide the internet with a homepage for anything and everything about our planet Earth and the environment.

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WATER RESOURCES AND MANAGEMENT
Scientists determine the Great Lakes are nonrenewable
The Great Lakes hold about 21 percent of the planet's surface fresh water, yet less than one percent of that volume renews each year. That second number, not the first, sets the limits on everyone who drinks from the basin.
UNIVERSITY OF MICHIGANERIC RALLS