Ozone losses of more than 60 per cent have occurred in the arctic stratosphere near 60,000 feet in one of the coldest winters on
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/arcric-ozone-loss
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-layer