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The main energy source used by humans has changed over time from A. fossil fuels to solar. B. wood to wind. C. wood to fossil fuels. D. fossil fuels to nuclear.
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5 votes
The main energy source used by humans has changed over time from

A. fossil fuels to solar.
B. wood to wind.
C. wood to fossil fuels.
D. fossil fuels to nuclear.

User KylieCatt
by
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1 Answer

5 votes
for what i know of its C
User Stefana
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