Bottled gas used as a fuel includes BUTANE, propane, ethane, ETHANOL, PEAT, OIL, and COAL. BUTANE is a hydrocarbon with six carbon atoms, propane is a hydrocarbon with three carbon atoms, ethane is a hydrocarbon with two carbon atoms, ETHANOL is an alcohol with two carbon atoms, PEAT is a type of organic fuel made from decaying plant material, OIL is a fossil fuel derived from ancient plants and animals, and COAL is a combustible black or brownish-black sedimentary rock.