The worst wildfires in US history, Arctic sea ice trending towards a historic low, simultaneous hurricanes in the Atlantic Ocean and the hottest summer in the northern hemisphere since records began: scientists say this year’s sequence of natural disasters and record temperatures have exceeded their worst fears.
美國爆發(fā)史上最嚴重野火，北極海冰趨向歷史低位，大西洋同時形成幾個颶風，北半球迎來有記錄以來最熱夏天——科學家們表示今年一連串的自然災害和創(chuàng)紀錄氣溫超出了他們的最糟糕擔憂。
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