What makes you a hydrogen believer?

I'm not quite a believer yet. I love the concept and have for many years. I've been aware of its possibilities for a long time. But, the reality is that it takes energy to produce energy, and hydrogen technology does not escape that equation. I do think a combination of technologies is the best solution, such as ever-improving battery technology (go Chevy Volt!), solar, wind, hydrogen, bio fuels, and even conventional fossil fuels. We need to have vehicles and infrastructure that allow this flexibility. Chevy Volt (which I believe allows for hydrogen) seems to come closest to that concept. That's just my take in it.