Fuel Dwarf Fortress Wiki
In Dwarf Fortress, bituminous coal is not the same as "coal" see that article if desired. Fuel, coal, and refined coal are three ingame terms that refer to the same thing, any unit of charcoal or coke, the two fuels used to power hightemperature industries, namely metalworking, glassworking, and pottery. One unit of either of these fuels ...