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4 votes
Which of these is not currently a source of usable energy?

A. Heat from within the earths crust
B. Running water
C. The sun
D. The moon

2 Answers

6 votes
The moon is the correct answer
Heat- geothermal
Running water- hydro electrics
The sun- solar
The moon- not usable
User Lennyklb
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5.8k points
3 votes
The moon is not a current source of usable energy though they are working on it
User Stefan Sprenger
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6.2k points