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最佳答案:Due to over explotation by humans and the discharge of large amount of greenhous
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最佳答案:it can decrease greenhouse gases.We shouldn't left the light on when we are away
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最佳答案:The people more and more realize the development environmental protection produc
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最佳答案:The circle havees electrochemistry and the catalytic agent respect that the worl
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最佳答案:我最很英语了