Quote from ArchAngel:
Off topic, but an interesting signature - nice idea in theory, but it's hardly a near term reality in large scale application. Have you given any thought to how they'll deliver liquid hydrogen to "gas" stations across the country? What level of enormous infrastructure change that is? Not just delivery and storage (which is significant), but also having to replace normal gas pumps with laser guided, computer controlled affairs because you can't let people do the pumping themselves. And you can't co-exist with existing gas stations because of the increased explosive danger, so you need all new "Hydro stations". And how about what would happen in a car accident if the tank cracked?
Cutting over to hybrid autos (and making SUVs and minivans use the same emission and fuel economy standards as cars) is a whole lot easier, can be done very quickly, doesn't involve a trillion dollar, ten year infrastructure upheaval, and would cut oil dependence to a fraction of what it is now. Possibly enough that domestic production could fully cover demand while the much longer timeframe non-oil alternatives are developed.