The first thing the city govt did after Mr Modi took over was that it sent officials to Gujarat to study the Sabarmati river
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/clean-yamuna-pollution-control-top-priority
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sabarmati
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution