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Coal is the official state mineral of Kentucky.
About: Amazing Mining Models
Came across this video and those are really cool working models.
To think early engineering would evolve into spectacular tunnels and land constructions. These guys were pioneers and explorers Sharron. Very interesting models. ATB Mark.
Coal is extracted from the ground by coal mining, either underground by shaft mining, or at ground level by open pit mining extraction.
Coal is primarily used as a solid fuel to produce electricity and heat through combustion. World coal consumption was about 7.25 billion tonnes in 2010
The price of coal increased from around $30.00 per short ton in 2000 to around $150.00 per short ton as of September 2008.
In early 2015, it was trading near $56/ton.