Why is water scarcity increasing on Earth? A. The polar caps are melting.
B. Global population is decreasing.
C. The amount of freshwater on Earth is decreasing.
D. More land is being farmed.

D: more land is being farmed

Explanation:

This is the same thing as over farming.

Irrigation systems are used to work the entire day with no stop, using so much water and allows water to be over used. Many farms now use irrigation systems. You have to think about where the answer D goes to: more farms = more water usage for plants, crops, utilities, animals.

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