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简介：地球已有46亿年的历史，它在不同时期会有不同的变化，地球温度每上升一点，就会给我们的地球环境带来剧烈的影响，全球变暖和人类排放大量的温室气体之间有密切的关系。收起
真相追踪 [走近科学] 20120314
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