Rivers are the source of most of the fresh surface water people use for drinking, but they only constitute about 1,250 cubic kilometers, about 1/10,000th of one percent of the total water.on the earth. Every drop counts.
Rivers are the source of most of the fresh surface water people use for drinking, but they only constitute about 1,250 cubic kilometers, about 1/10,000th of one percent of the total water.on the earth. Every drop counts.
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