I drove 1800 miles in a Hydrogen Car

I'm not trying to be that guy but when you saying it's "not burning" the hydrogen it's not technically correct... Burning can mean two things that also apply to hydrogen fuel cells, burning can either mean to create heat or fuel from an fuel source (both heat and energy are created in a fuel cell), or an oxidation reaction (something that also happens) so yes it's burning, just burning without flame