&gt; I think Hydrogen Fuel Cells are the future of the automotive world.<p>It&#x27;s unlikely.<p>Hydrogen makes a poor fuel because it&#x27;s very hard to store. It leaks through almost anything, and embrittles most metal.<p>It&#x27;s possible to store, but it&#x27;s expensive. It&#x27;s also not very dense, so you need a lot of pressure, which just makes the storage&#x2F;leakage problem worse.<p>I think Methane might be the fuel (not energy source) of the future. It has almost all the advantages of hydrogen, with much fewer problems.<p>The energy source can be something else, so the CO2 emissions of methane are not relevant.<p>Unrelated, but if we could store mono-atomic hydrogen, that would be something! There is more energy available in hydrogen bonding with itself than with oxygen.