Back in the 80s, teaching Year 10 Science, I showed a video that espoused the use of hydrogen gas as a fuel... not in the fancy high tech way proposed today whereby the major companies can generate cash cows, but using internal combustion engines slightly modified (LPG). Demonstrations of the safety of this fuel compared with petrol were conducted. Most importantly fairly exotic metals were used within the fuel tank. These metals overcame the "problems" of the molecular dimensions of the gas, ie its ability to diffuse/effuse through solids. The video showed a bus running successfully and cheaply. The chief cost of this method would be that of the initial fuel tank. Catalyst last night was another distractor in favour of big business.
Can anyone else remember this video better than I?
Does anyone else wonder (not really) at the way "science" has complicated the issues?
Either way, I'm interested to read other forum members' comments.