- (B) Of the total freshwater on Earth, over 68% is locked up in ice and
glaciers. However, as ice and glaciers melt, this number will change
significantly. Another 30% of freshwater is in the ground. Rivers are the
source of most of the fresh surface water people use, but they only constitute
about 0.0002% of the total freshwater on Earth.
marvins-underground-k-12
(Marvins-Underground-K-12)
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