The Antarctic ozone hole would have been 40% bigger by now if ozone-depleting chemicals had not been banned in the 1980s, according to research.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/how-arctic-ozone-hole-was-avoided-montreal-protocol
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/bbc-uk
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-hole
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arctic
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/montreal-protocol
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/europe
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cfcs
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/australia
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/new-zealand
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-kingdom-uk