Answer:
It was the ancient Greeks who first developed the passive solar concepts that the Romans adopted, but the Romans used their engineering and design skills to improve the technique. Passive-solar buildings are built based on the orientation of the sun's path and use the sun's rays to heat the interiors.
People believe that the war lasted four years .
Answer:
Yuan dynasty was marked by struggle, famine, and bitterness among the populace.
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Answer: An entrepreneur
Explanation:
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