On Mon, 4 Nov 2013, Henry Vanderbilt wrote: > Of course, if you want your hydrogen as H2, then absent ultra-cheap > energy H2O isn't the best source. Energy costs, and cracking CH4 takes > far less energy than cracking H2O. There have been a few small demo projects which have used electrolysis for making hydrogen, usually due to special circumstances of one kind or another. For example, if memory serves, there are a couple of H2-powered buses in Iceland, and their fuel station uses electrolysis because Iceland has (a) lots of hydroelectric and geothermal power, and (b) no natural gas. Henry Spencer henry@xxxxxxxxxxxxxxx (hspencer@xxxxxxxxxxxxx) (regexpguy@xxxxxxxxx)