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1. How much salt can freshwater contain?
a. 5%
b. 0.1%
c. 0.5%
d. 1%

2. How much of the planet's water is freshwater?
a. 3%
b. 50%
c. 1%
d. 97%

3. How much of our planet's water is accessible for us to use?
a. 97%
b. less than 1%
c. 2%
d. 3%