Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ntpcs-plan-buy-stake-coal-mine-hits-hurdle
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/economic-times-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-thermal-power-corporation-ntpc