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  • [[File:CI-Coal-RBusch-WCU-i8bhou-600-400px.jpg|thumb|An example of anthracite coal, the purest grade of coal. Copyright Dr. Richard Busch, Image source:
    4 KB (556 words) - 13:07, 16 June 2015
  • File:CI-Coal-RBusch-WCU-i8bhou-600-400px.jpg
    An example of anthracite coal, the purest grade of coal. Copyright © Dr. Richard Busch, Image sourc
    (600 × 400 (69 KB)) - 16:18, 10 June 2015
  • ...8,800 British thermal units per pound. Other common forms of coal such as anthracite and bituminous burn at higher amounts of British thermal units per pound ma
    14 KB (2,221 words) - 15:10, 1 May 2020