Energy
Energy
Energy
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<strong>Energy</strong> and environmentWHATTypes of energy; energy crisisWHYHistory and current status of energyconsumption ( 能 源 消 费 的 历 史 和 现 状 )HOWSolutions to energy shortage and pollution( 能 源 短 缺 和 污 染 问 题 的 对 策 )
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