While Delhi is among the first few cities in the country to have introduced a modern fleet of low-floor buses and a sound Metro system, much needs to be done to upgrade the public transport system for those who do not fall on the route map of these services.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/many-options-capitals-transport-system-still-track
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/battery-vehicles
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi