Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sikkim-observes-earth-hour
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/assam-tribune-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-efficiency
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wwf
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sikkim
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gangtok