There are four types of coal: anthracite, bituminous, subbituminous and lignite. Anthracite contains the most energy, and lignite the least. Here in Wyoming, the coal we mine is subbituminous. That ...
The Crisafulli Government has approved the $314.9 million extension of the Ensham Coal Mine near Emerald. Approval secures ...
Last month’s column explored prehistoric mines, and this month I will follow up on the topic by visiting medieval and modern ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results