Delhi's air pollution measures like introducing compressed natural gas, building the Metro and moving polluting industries outside city limits have been praised universally.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhis-satellite-towns-bearing-brunt-increase-air-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/author/jayashree-nandi
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gurgaon-t
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noida
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/faridabad-t
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/population
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-monitoring
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmentalists