While the city has been witnessing an unprecedented increase in unauthorised colonies over the past few years, the number of slum dwellers in Delhi has decreased.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhi-sees-decline-number-slum-dwellers
[2] http://admin.indiaenvironmentportal.org.in/category/author/vishal-kant
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/slums
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/population
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-urban-development
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/people