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5 votes
Both active solar heating systems and passive solar heating systems

a.must face south
b.use pumps and fans
c.reduce the need to use fossil fuels
d. only work during the day

1 Answer

2 votes

Answer:

Hmm.

Step-by-step explanation:

C. Reduce the need to use fossil fuels

( If it's not C, then try D)

User HyeonJunOh
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