- Climate change accentuates the threat.
气候的改变加剧了这种威胁 - By 2050, a quarter ofthe earth's species...
到2050年 地球上四分之一的物种 - Could be threatened with extinction.
面临着灭绝的威胁 - In these polar regions, the balance of nature has already been disrupted.
在两极地区 自然平衡已经被破坏了 - Off the coast of Greenland, there are more and more icebergs.
远离格陵兰海岸的地方 出现了更多的冰山 - Around the north pole, the ice cap has lost...
整个北极地区的冰冠面♥积♥ - 30% of its surface area in 30 years.
在过去30年间减少了30%