Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sound-pollution-irks-sivasagar-citizens
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/assam-tribune-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution-control
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/assam