“More than a gasoline bomb, hopefully. Gasoline is more dangerous.”

Citation needed. How is gasoline more dangerous? While gasoline is very dangerous, gasoline is a liquid and will not burn until vaporized; Gasoline is dangerous because it vaporizes quickly. H2 is already a gas and has a ridiculously low spark energy. Furthermore H2 is under pressure.

Gas does have a lower auto-ignition T than H2, that’s no fun, but overall H2 scores worse than gasoline.

“Do you ride on a CNG city bus?”

CNG stands for Compressed Natural Gas; i.e. methane. Methane is a lot easier and safer to use than H2 because it:

- Packs a lot more energy vs. P so the tanks don’t have to be as strong - Doesn’t embrittle the container - Much higher spark energy (in fact, CH4 is kinda hard to light) - Smaller flammability range (i.e. mixture with air that will ignite) - lower auto-ignition T

[1] https://en.wikipedia.org/wiki/Flammability_limit