[elihu]

Unfortunately we don't really have the battery technology for this to work for long range flights, like the commercial flights that make up the bulk of air traffic carbon emissions.

I expect the best near-term solution is just to find a way to synthesize jet fuel (or something that works equivalently) on a large scale from something other than fossil fuels. I don't know what the state-of-the-art is in synthetic fuels.

Another option would be to find a way to transfer electricity to a moving aircraft so it could recharge in the air, but I have difficulty imagining how that could be made to work (microwaves? high-power lasers and solar panels? wires held aloft by zeppelins?), especially within the constraints of modern technology.