Recently, I brought up Pres Bush touting Hydrogen as the fuel of the future. I agree - it won't be a viable option until the mid-21st century. A few days ago, the Wikiapedia had a feature article on an ill-fated Swedish balloner that was going to be the first to the North Pole by sailing in an untested hydrogen ballon in 1897. The party of three crashed on pack ice, then walked to a deserted Artic island in Svalbard and died of inadequate supplies, exposure, and exhaustion. (story) The article is no longer of the main page, but the quote was funny: "...he put his faith and life in the untested hydrogen technology with far too much optimism."