Actually, from a city pollution point of view, cars registered in Flagstaff do not even have to pass smog. Flagstaff does not suffer from pollution like much larger metropolitan areas. The local environment is completely beside the point anyway.

We're not replacing coal power stations. It isn't an "upgrade" away. Our energy demand is increasing so any new stations supplement rather than replace existing power stations. The stakeholder wouldn't shutdown a power station before its lifetime anyway. They need to recoup their investment. The current operational units at the station will not be shutdown until 2025 and they'll probably add more to extend the lifetime of the station.

And furthermore, if the plant was to be supplemented with solar, where do you think the energy will come from at night when the car is plugged in?