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.
美国爆发史上最严重野火，北极海冰趋向历史低位，大西洋同时形成几个飓风，北半球迎来有记录以来最热夏天——科学家们表示今年一连串的自然灾害和创纪录气温超出了他们的最糟糕担忧。
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