The price of production is only a small part of the overall cost of hydrogen — the gas also needs to be stored and transported, which sounds simple, but is anything but.

Hydrogen (H2) is the smallest molecule that exists, measuring 0.000000074mm wide — 100 times smaller than a methane molecule, meaning that it is very hard to store. It will slowly leak through some materials, cracks or poor joints and can make metal brittle.