The Indian Air Force has decided to study ways and means to reduce emission of harmful gases from its aircraft so as to prevent depletion of the ozone layer.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/iaf-will-check-gas-emissions
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ozone-layer
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/emissions-trading
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-transport