The Tamil Nadu government had ordered the state Pollution Control Board to seal and "permanently" close the group's copper plant following violent protests over pollution concerns.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ngt-hear-vedanta%E2%80%99s-plea-against-closure-sterlite-copper-plant
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/copper-industry
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb-0
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tuticorin
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment