[tankenmate]

The normal industry name for lower quality coal is "brown coal" (the most common type is lignite, which actually has a brown colour), and higher quality coal is "black coal". For coal used for steel making / coking has to be purer so low sulphur black coal is the only option.

[fellellor]

This may be true to some extent, but a significant amount of noise was generated because of the previous government refusing to issue mining clearances for coal. I think a number of private companies had laid out infrastructure to use brown coal after the energy reforms by the Vajpayee government.