Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mettle-mining
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/financial-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mineral-based-industry
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heavy-metals
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industry