September 2006
August 2006
July 2006
March 2006
北極永凍層快速融化的新證據
北極暖化是否會造成永凍層(permafrost)的快速融化一向為科學家們所關注,新研究指出阿拉斯加部分地區正面臨永凍層快速溶解的窘境。永凍層若大量融解將對全球氣候環境造成不小的衝擊。
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(4 marks)
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