Links:
[1] http://admin.indiaenvironmentportal.org.in/news/biggest-cities-merging-mega-regions-says-un-report
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-habitat
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-development
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/un
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global