Which of these is not currently a source of usable energy?
a. heat from within the earths cru...
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Biology, 07.08.2019 03:20 elianagilbert3p3hh63
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
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Answers: 1
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