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Science Quiz: Nuclear Weapons & Water Science
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What percentage of the Earth's water supply is freshwater?
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A
3
💡 Explanation:
Only about 3% of Earth's total water is freshwater, with the vast majority (approximately 97%) being saltwater in oceans and seas. Of that small freshwater portion, most is locked in glaciers, ice caps, and groundwater, leaving less than 1% as accessible surface freshwater.