Every month six aircraft are added to the Indian airspace. In 2006-07, 60 million people travelled by air in the country
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/congestion-skies-costing-india-dearly
[2] http://admin.indiaenvironmentportal.org.in/category/author/arnab-pratim-dutta
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-efficiency
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-transport
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/infrastructure-development