自从20世纪70年代以来，科学家就知道这一保护层一直被人造气体损耗，特别是曾用于喷雾剂的氯氟烃。
Since the 1970s, scientists have known that the protective layer is being depleted by manmade gases, in particularly the CFCs once used in aerosols .
厄尔尼诺现象助长了这个更高的温度，但很多科学家认为人造温室气体的排放的升级把全球温度推向更高。
The el nino weather pattern has contributed to higher temperatures, but many scientists say elevated levels of man-made greenhouse gases are pushing temperatures higher.
另一部分是因为有关人造温室气体排放带来的影响在反馈循环系统中不断扩大的证据在不断增加，比之前意识到的更为严重。
Partly it's growing evidence that feedback loops amplifying the effects of man-made greenhouse gas emissions are stronger than previously realized.
应用推荐