I'm sceptical of hydrogen for the basic reasons that it is low energy density and it is hard to store. It literally leaks through the walls of metal storage tan

I'm sceptical of hydrogen for the basic reasons that it is low energy density and it is hard to store. It literally leaks through the walls of metal storage tanks. That said, there is work being done on alternative storage methods. If there is a significant breakthrough, there, it could mean hydrogen becomes useful as a store of energy in those few situations where alternatives just won't work.