the Montreal Protocol may be doing wonders for healing the ozone layer over the poles, but it seems to have overlooked the problem in other places. According to a recent study, northern mid latitude stratospheric ozone levels will not recover to pre-1980 levels due to increasing levels of nitrous oxide (n2o)
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/no-laughing-matter-3
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/montreal-protocol
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chemical-fertilisers
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-layer
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/emissions-trading
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/australia