Secondly, at room emperateure liquid hydrogen turns into gas very rapidly. So even th slightest leak will produce a plume of gas unlike petrol.
Wouldn't that make is safer? Assuming a hydrogen car was in an accident and the tank got ruptured unless there is a flame wouldn't the hydrogen turn into a gas and mix back into the air which to me seems a lot safer than petrol all over the ground which is what currently happens? At least it would be easier to clean up.
