add merc to that they have had a b class constantly going round the globe (i think at last check it was at 3.200,000 miles :O on fuel cell tech, they are all working on it, its just the platinum coils for it to be created on site cost way to much, once they work out alternatives there will not be a need to transport it, Hydrogen fuel cells power the shuttle’s electrical systems, producing a clean byproduct – pure water, which the crew drinks, they have been using fuel cells since the 70s :O the problem as I said for fuel stations to make there own at the moment in each station would cost too much and probably get dug up a nicked because of it value.