NASA and NOAA Scientists reported that the ozone layer is starting to mend and hopefully recover by the middle of the 21st century, thanks to an international effort to decrease the use of CFCs.
NASA and NOAA measure ozone from space using Satellite Systems. Warm temperatures limit ozone depletion. The same happened in September 1988 and 2002. Scientists try to understand this rare event.
The Montreal Protocol on Substances that Deplete the Ozone Layer was signed in 1987. This agreement is considered as the most successful environment protection agreement. It regulates the production and import of ozone-depleting substances and since 2000 they have been declining steadily.
If nothing had been done to stop the thinning, the world would have destroyed two-thirds of its ozone layer by 2065.
The ozone hole above Antarctica remains small and is expected to gradually become less severe. Scientists hope that the upper ozone layer above the Northern Hemisphere should be completely repaired in the 2010s and the hole above Antarctica should disappear in the 2060s.
This news means more ozone over the hemisphere and less ultraviolet radiation at the surface, which causes skin cancer, crop damage, and other problems.