Natural Gas and Propane
are both fossil fuels that are normally gasses and are used as fuels. They are stored in a compressed form and rarely cause problems. Why do you claim the pressurized H2 is too dangerous for widespread use? What evidence do you have?
I recall a video demonstration from many years ago. Three cylinders were filled with the equivalent (fuel energy content) quantities of gasoline, propane and H2. From behind cover, each cylinder was pierced by an armour piercing sniper round. The gasoline exploded and produced a large fire. The propane tank exploded, leaving a small crater and no tank fragments. The H2 tank had a small bullet hole and an invisible flame from burning H2 (H2 leaking from the hole) above the tank. The flame was detected using a wooden splint, which ignited when passed through the flame. H2 cannot combust without O2.
Remember the damage to the WTC towers from two airliners almost fully loaded with fuel? The highjackings were performed before the flights had finished climbing. This was an important part of the terrorists plan to maximize the fuel load in the attacks.
