The infrastructure to support other fuels isn't there. What I mean is, fueling stations. Only the oil companies have that infrastructure and they are not about to convert all their gas stations to hydrogen filling stations, unless of course they are the ones selling the hydrogen, know what I mean?
Apparently in Iceland they put together a pilot project to build an infrastructure of alternative fuel filling stations to see if it could be done, but it's cost millions of dollars and they are a tiny country.
