Links:
[1] http://admin.indiaenvironmentportal.org.in/news/solar-powered-traffic-signal-inaugurated-avanashi-road
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/roads
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicles
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy