Indiscriminate dumping of garbage and release of untreated effluents by industries along the Uppanar are being cited as main reasons
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mangroves-cuddalore-district-come-under-threat
[2] http://admin.indiaenvironmentportal.org.in/category/author/s-prasad
[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/cuddalore
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mangroves
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-disposal
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ngo
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tsunami
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests