It's a false dichotomy. We can BOTH build more green energy, and use some of it to displace fossil fuels from transportation.

If you predicate the future on reducing car dependency, good luck. I mean it's a noble goal, but you're gonna be holding your breath a while. Cars are popular for a lot of reasons.

Likewise trying to build enough solar panels for all the car-miles currently driven ends up being a mountain of solar indeed. So reducing the miles driven would ALSO be nice.

But we have to start on both and push hard on both, because meeting in the middle will happen a lot sooner.