The Antarctic ozone hole is more severe this year than ever before, and ozone levels over temperate? Regions are dipping as well.

南极洲臭氧层破洞今年更趋严重，而且温带地区上空的臭氧含量也在下降。

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However, CFCs can persist for decades in the stratosphere-the Antarctic ozone hole is still there, though it's expected to grow smaller in coming decades.

然而，氯氟烃可以在同温层停留数十年，南极臭氧空洞就一直存在，虽然专家预计这个空洞会越来越小。

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We reversed our first man-made global atmospheric crisis by banning chlorofluorocarbons -- by 2015, the Antarctic ozone hole will have shrunk by nearly 400, 000 square miles.

我们通过禁止含氯氟烃安然度过了第一次人为的全球大气危机——到2015年，南极臭氧空洞的面积将缩小近400,000平方英里。

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"Unfortunately, it's going to be several decades before we see the end of the Antarctic ozone hole, " said Dr Susan Solomon of the United States National Oceanic and Atmospheric Administration.

BBC: News | Sci/Tech | Ozone hole reaches record size

The Antarctic ozone hole's current size is approximately 10 million square miles (26 million square kilometres.) It is approximately three times the area of Australia and is the largest ozone hole ever.

BBC: News | Sci/Tech | Ozone hole reaches record size

The argument is that while BAS science has yielded the discovery of the ozone hole and other important findings on the glaciers and biology of the Antarctic Peninsular, the future lies in collaboration.

BBC: Decision looms on future for British polar research