英语翻译According to a report by Australian researchers,the hole

英语翻译
According to a report by Australian researchers,the hole in the ozone layer over Antarctica will probably start closing within five years.They say it may be completely closed within fifty years.The ozone layer protects the Earth from dangerous radiation from the sun.The hole in the ozone layer was discovered over Antarctica almost thirty years ago.At the time,it was three times the size of Australia.
The report found that ozone-destroying gases in the upper atmosphere were at or near their highest levels in the year2000.But since then,there has bee continuous progress made toward the recovery of the ozone layer.
Satellite information showed that levels of ozone-destroying gases in the atmosphere are slowly decreasing.At its largest this year,the ozone hole covered more than 15 million square kilometers.That is down from a yearly average of 23 million square kilometers over the last six years.
Chlorofluorocarbons,or CFCs,are responsible for destroying part of the ozone layer over Antarctica.CFCs have been widely used since the1930s in cooling devices such as refrigerators and air conditioners.CFCs remain in the atmosphere for years.
Government scientist say the level of chlorine in the atmosphere is decreasing because of restrictions on the use of chlorofluorocarbons.The chemicals were restricted under an international agreement called the Montreal Protocol in 1987.Under the Protocol,developing countries promoted to cut their use of chlorofluorocarbons in half by the year 2005.They also agreed to an eighty-five percent cut by the year 2oo7.

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据报道,澳大利亚研究人员,臭氧层空洞南极上空可能会开始在五年内完成.他们说,这可能是完全封闭的五十年.臭氧层保护地球免受危险辐射的阳光.在近30年前南极上空发现臭氧层空洞.当时,它的大小为澳大利亚的三倍.
该报告发现,在2000年,臭氧层破坏的气体在大气层上部是达到或接近其最高水平的.但自那时以来,对臭氧层的恢复不断取得了进展.
卫星资料显示,各级臭氧破坏大气中的气体正在缓慢下降.在最大的一年中,臭氧空洞覆盖超过15万平方公里.在过去6年中,每年平均下降二千三百万平方公里.
氯氟烃,或氟氯化碳,负责销毁的一部分,南极洲上空的臭氧层.氟氯化碳已被广泛用于自19世纪30年代的冷却设备,如冰箱和空调.氟氯化碳仍然在大气中来.
科学家说,政府一级的大气中的氯气正在减少,因为限制使用氯氟烃.受到限制的化学品根据一项国际协议要求的蒙特利尔议定书于1987年.根据这项协议,发展中国家推动削减其使用的氟氯化碳的一半到2005年.他们还商定2007年减少百分之85.