A UN-led climate change report released Friday says keeping greenhouse gas emissions near current levels would cost only a tiny fraction of world economic output, but that more drastic reductions are needed by 2050 in order to keep global warming in check
A UN-led climate change report released Friday says keeping greenhouse gas emissions near current levels would cost only a tiny fraction of world economic output, but that more drastic reductions are needed by 2050 in order to keep global warming in check
星期五发布的一份由联合国主持的研究报告指出:控制温室气体排放只需要消耗全球经济很小的一部分，但是如果等到2050年，则需要大幅度减少排放量方可控制全球气候变暖。