What is Synthetic fuel?
{{no sources|date=May 2014}} A '''synthetic fuel''' (or '''synfuel''') is a fuel in liquid or gas form that can be manufactured. Synfuels have long been made from coal. Oil extracted from [[shale]] or tar sands is also sometimes called synfuel. Fuels can also be made from non-food [[crop]]s. [[Tar sands]] are a combination of sand and a thick oil called [[bitumen]]. This, along with [[oil shale]], which is a layer of rock riddled with [[hydrocarbons]] in the form of [[kerogen]], can be heated with steam to remove the [[Petroleum|crude oil]] in the two substances. Like oil, it must be refined before being put to use. == Related pages == * [[Biofuel]] [[Category:Fuel]] [[Category:Geology]]