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Look at railway maps in Tokyo
Or if you are too lazy to search, https://youtu.be/3NfUAO_KjQA
Look at railway maps in Tokyo
Or if you are too lazy to search, https://youtu.be/3NfUAO_KjQA
You can use liquified hydrogen which need to be chilled and insulated, and will evaporate away in a short time if not properly sealed
Or you use compressed hydrogen which means you are basically carrying an IED that weighs several hundred kilograms with the amount of pressure inside the gas tank
And hydrogen combustion is as others have said, inefficient.
Another issue is that you also need to use basically pure oxygen if you want to use a hydrogen fuel cell, otherwise the catalyst inside the cell would get poisoned
And well, there is a car that did all that, the Toyota Mirai, but that also pretty much ended in commercial failure, due to lack of hydrogen filling infrastructure and a whole load of other reasons.
Well, even though gastric acid(mostly hydrochloric acid) in our stomach does have a relatively low pH, it is very diluted, so in practice it just kills germs and stuff and won’t obliterate everything going inside you
Ever heard of domestication?
Imagine having no good public transport