How about this for phase-out: 1) use ev motor engines, but power with a fuel cell + methane/hydrocarbons 2) phase in synthetic fuels 3) swap out the fuel cel

How about this for phase-out: 1) use ev motor engines, but power with a fuel cell + methane/hydrocarbons 2) phase in synthetic fuels 3) swap out the fuel cell and synth fuel for batteries when feasible