Students compete with underwater robots they build themselves
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What percentage of the entire world's freshwater supply is stored or contained in the Great Lakes?
The Great Lakes contain 20% of the world's freshwater supply -- the largest freshwater system in the world! Collectively, the lakes contain over six quadrillion gallons of water.
The Great Lakes hold a number of other records as well:
Thank you for your question!
Answered on February 1, 2001