As we move BTUs from fossil fuel gasoline to electricity, the incremental energy will come from renewables.
Self-Driving Cars Will Improve Our Cities. If They Don’t Ruin Them.
Robin Chase
50369

Again, the large majority of American electricity is derived from fossil fuels, and even with the considerable advances that have come with renewable sources like wind and solar, it will take decades to fully transition away from the current electricity infrastructure. It would be a fallacy to argue that EVs represent some sort of panacea in this regard.