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JulijaS [17]
3 years ago
6

One of the most difficult solar energy design problems to solve is:

Chemistry
2 answers:
Sonja [21]3 years ago
6 0
I'm not sure but i would say C.storing the heat energy.
Zina [86]3 years ago
6 0
Yes the answer is c. Storing heat energy
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3 years ago
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