The phrase "hard coal" refers to a type of coal that is solid, compact, and has a high carbon content. It is called "hard coal" because it is difficult to break or crumble compared to other types of coal. Full definition
Costs will also not be a topic, given the last results of the tender almost equal to the fuel costs of hard coal plants. (energypost.eu)
The move away from hard coal has left a lingering legacy in some cities, where unemployment can exceed 10 per cent. (corporateknights.com)
Much of global coal production is used in the country in which it was produced; only around 15 % of hard coal production is destined for the international coal market. (worldcoal.org)