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據美國國家冰雪資料中心(National Snow and Ice Data Center)人員表示,受地球暖化效應影響,2012年北極冰覆蓋面積為86萬平方英里,較1979年的180萬平方英里減少53%。由於北極暖化得非常快,若未來20年北極夏季再也看不到冰面,也不會令人感到驚訝;但全球船運公司對於北極航道的前景,卻感到非常興奮。
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