Links:
[1] http://admin.indiaenvironmentportal.org.in/news/board-extends-noise-pollution-monitoring
[2] http://admin.indiaenvironmentportal.org.in/category/author/deepa-h-ramakrishnan
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution