Links:
[1] http://admin.indiaenvironmentportal.org.in/news/german-city-wonders-how-green-too-green
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-york-times-new-york
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wind-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/germany