The increase in corruption in coal is closely linked to the increasing importance of this mineral in the economy and of the industry in political funding.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/how-coal-entwined-political-funding
[2] http://admin.indiaenvironmentportal.org.in/category/author/m-rajshekhar-0
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/economic-times-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/corruption
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-rural-employment-guarantee-act-nrega
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/minerals
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-distribution-system-pds
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-coal
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-environment-and-forests-moef
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal-india