Changes

'''Bituminous coal''' is a dense coal, usually black, sometimes dark brown, often having well-defined bands of bright and dull material.  It is used primarily as fuel in steam-electric power generation, though substantial quantities also used for heat and power applications in manufacturing and to make coke.  

'''Bituminous coal''' is a dense [[coal]], usually black, sometimes dark brown, often having well-defined bands of bright and dull material.  It is used primarily as fuel in steam-electric power generation, though substantial quantities also used for heat and power applications in manufacturing and to make coke.  

Bituminous coal is the most abundant coal in [[Coal mining|active U.S. mining regions]], since the mining of [[anthracite coal]] or "hard coal" has dropped away. Its moisture content usually is less than 20 percent. The heat content of bituminous coal ranges from 21 to 30 million Btu per ton on a moist, mineral-matter-free basis.  

Bituminous coal is the most abundant coal in [[Coal mining|active U.S. mining regions]], since the mining of [[anthracite coal]] or "hard coal" has dropped away. Its moisture content usually is less than 20 percent. The heat content of bituminous coal ranges from 21 to 30 million Btu per ton on a moist, mineral-matter-free basis.