臭氧层停止变薄 2048年恢复正常

爱思英语编者按：据英国每日邮报报道，联合国报告称，“臭氧层没有继续消失并会在2048年前完全恢复原状”。联合国的科学家们已经证实，臭氧层将不再消失，而且可能在本世纪中叶时恢复原状。联合国上周发布的一份最新报告表明，随着冰箱、喷雾器等产品曾使用的近100种物质逐步被淘汰，臭氧层的进一步耗竭已经得到控制，尽管它还没有开始增加。该报告称，保护臭氧层的全球行动已经在世界范围内防止了数以百万计的皮肤癌病例发生。

Ozone layer "is no longer disappearing and will return to full strength by 2048", says UN report.

The ozone layer is no longer disappearing and could be back to full strength by the middle of this century, UN scientists have confirmed.

The phasing out of nearly 100 substances once used in products like refrigerators and aerosols has stopped the ozone layer being depleted further, although it is not yet increasing, according to a new United Nations report released last week.

And it claimed that international efforts to protect the ozone layer has averted millions of cases of skin cancer worldwide.

The ozone layer outside the polar regions is projected to recover to pre-1980 levels by 2048, although the annual springtime ozone hole over the Antarctic is not expected to recover until 2073.

Ozone in the stratosphere is important because it absorbs some of the Sun’s dangerous ultraviolet radiation.

The report, published jointly by UNEP and the UN World Meteorological Organization (WMO) is the first comprehensive update in four years on the Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol phasing out chemicals which accelerate both ozone layer damage and climate change.

"It (the Protocol) has protected the stratospheric ozone layer from much higher levels of depletion by phasing out production and consumption of ozone depleting substances," said the report.更多信息请访问：http://www.24en.com/

The report was written and reviewed by 300 scientists and launched on the UN International Day for the Preservation of the Ozone Layer.

Given that many substances that deplete the ozone layer are also potent greenhouse gases, the Montreal Protocol ‘provided substantial co-benefits by reducing climate change,’ it added.

In 2010, reductions of ozone-depleting substances as a result of the Protocol, were five times larger than those targeted by the Kyoto Protocol, the greenhouse emissions reduction treaty.

"Without the Montreal Protocol and its associated Vienna Convention atmospheric levels of ozone-depleting substances could have increased tenfold by 2050," Mr Steiner said.

"This in turn could have led to up to 20 million more cases of skin cancer and 130 million more cases of eye cataracts, not to speak of damage to human immune systems, wildlife and agriculture."