Multiple choice

What amount of Earth's total water supply is usable fresh water?

  1. 50%

  2. less than 1%

  3. 75%

  4. 25%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While Earth is covered in water, the vast majority is salt water in oceans. Only a tiny fraction (less than 1%) is fresh water accessible for human use.

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