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The top documents tagged [percent of human water]
Unit 4 Water: Where Has It All Gone? Deborah Soong
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Water and Life. How large is the earth? Radius:3986 mi (4000 mi) Diameter:7973 mi (8000 mi) Circumference: 25,048 mi (25,000 mi) 400 billion billion gallons
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Water and Life
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