&gt; One thing that isn&#x27;t addressed however is the sustainability of the energy source.<p>You can make hydrocarbon fuel for airplanes if you have electrical power. There is no risk of running out, you can make it literally from thin air! All the atoms necessary are in air (although obviously there are easier sources).<p>On top of that we could save our oil for airplanes and use other fuels for land vehicles - doing that we&#x27;d have effectively unlimited amounts.<p>&gt; Until we have electric airplanes, trains will continue to have a lower carbon footprint.<p>Being electrical does not automatically mean less CO2. I&#x27;m not following your logic.