Honda FCX concept fuel cell car in depth, Pt. 4 - Driving at Laguna Seca {Autoblog Green}

Dec 28th 2006 8:40AM The answer to the question of why hydrogen for automobiles lies in mobility. Liquid fuels are used because their high energy density and transportability. A similar argument is being promoted for the use of H2 gas. There is a reason we have converted from solid to liquid fuels (i.e., wood/coal to oil) over the past 100-150 years, and are now converting to gases as the fuels of choice. Most new power plants run on natural gas not coal or oil because natural gas systems are cheaper to build and are cleaner. Yes there is an energy density issue with H2, but don't forget a lot of energy is spent creating gasoline and diesel fuel. So if you want mobility you need either liquid or gas based fuels and H2 is one of the best if harnessed properly. As for E85 and biofuels, they have their challenges also.