Worth pointing out that the energy may matter more on a per mass basis than strictly per volume in some applications. By looking at MJ/kg, Hydrogen even beats o

Worth pointing out that the energy may matter more on a per mass basis than strictly per volume in some applications. By looking at MJ/kg, Hydrogen even beats out gasoline[1] although that's not the case for per unit volume[2] Special storage requirements are certainly something to considering especially with high pressures typically involved for gas storage or cryogenic temperatures for liquid. Although it's not as though other fuels have no special storage requirements - it's just that we're used to their complexities [1] 120 MJ/kg for hydrogen versus 44 MJ/kg for gasoline https://www.energy.gov/eere/fuelcells/hydrogen-storage https://www.energy.gov/eere/fuelcells/hydrogen-storage [2] 8 MJ/L for hydrogen vs 32 MJ/L for gasoline