steam reforming of gaseous hydrocarbons is seen as a potential way to provide fuel for fuel cells. the basic idea for vehicle on-board reforming is that for example a methanol tank and a steam reforming unit would replace the bulky pressurized hydrogen tanks that would otherwise be necessary. this might mitigate the distribution problems associated with hydrogen vehicles; however the major market players discarded the approach of on-board reforming as impractical. (at high temperatures see above).