国际日：潘基文呼吁再接再厉保护臭氧层
2015年9月16日 臭氧层能够吸收99%以上对人类有害的太阳紫外线，保护地球上的生命免遭有害紫外线的伤害，因此被誉为地球的保护伞。每年的9月16日是联大设立的“保护臭氧层国际日”。潘基文秘书长为此发表致辞，对全球采取共同行动，大幅减少消耗臭氧层物质的使用，并将在本世纪中期恢复臭氧层的努力表示赞赏。他同时期待即将在今年年底举行的巴黎气候峰会能够为保护地球的环境做出更大的贡献。
潘基文秘书长在致辞中指出，曾经被广泛使用的包括氯氟烃（CFC）在内的消耗臭氧层物质严重破环了保护人类免受有害紫外线伤害的臭氧层。经过人类共同的努力，30年前通过的《保护臭氧层维也纳公约》以及在此基础上通过的进一步控制氯氟烃类物质使用的《蒙特利尔议定书》，大幅减少了消耗臭氧层物质的使用，使臭氧层走上了恢复之路，并防止了每年可能出现的数百万起皮肤癌或白内障。
臭氧层破坏是当前面临的全球性环境问题之一，自70年代以来一直受到世界各国的关注。在1985年发现“南极臭氧洞”后，国际社会于当年在奥地利首都维也通过了《保护臭氧层维也纳公约》，并在此基础上，于1987年9月16日在加拿大蒙特利尔通过了《关于消耗臭氧层物质的蒙特利尔议定书》，以进一步对氯氟烃类物质的生产、使用和贸易进行控制。
16 September 2015 Ozone layer can absorb more than 99% solar ultraviolet that is harmful to humanity so to protect the livings on earth. For this reason， ozone layer is called "the umbrella of the earth". Annual 16 September is observed as the International Day for the Preservation of the Ozone Layer.United Nations Secretary-General Ban Ki-moon gave a speech to appreciate global community’s common action to lessen the use of ozone-depleting substances and the efforts for recovering ozone layer by the middle of this century. He also looked forward to the forthcoming Paris climate conference at the end of this year to make more contribution to environmental protection.
In the speech， Ban Ki-moon said that use of ozone-depleting substances such as chlorofluorocarbons （CFCs） had severely damaged the ozone layer that protects people from the sun’s harmful ultraviolet radiation. Through common effort， the Vienna Convention for the Protection of the Ozone Layer had been adopted 30 years ago. On the basis of former document， and the Montreal Protocol on Substances that Deplete the Ozone Layer was drafted. The practice of two documents helped largely reduced the use of substances that deplete the ozone layer， contribute to the recovery of ozone layer and prevent millions cases of skin cancer or cataract every year.
Ozone layer depletion is one of global environmental problems that we are facing and has got much attention from international community since 1970s. In 1985， on discovering Antarctic ozone hole， the international community formalized the Vienna Convention for the Protection of the Ozone Layer in capital of Austria， Vienna. Further on 16 September 1987， the Montreal Protocol on Substances that Deplete the Ozone Layer was drafted to control the production， use and trade on chlorofluorocarbons.
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