I hope this is only to put things in perspectives because cars suck for a multitude of other reasons, however we power them.

We can use solar energy to move a box that weighs 1/2 tons around, for every individual on the planet. The cars will still shed microplastics. The cars will still require paved parking lots that are not permeable, worsening floods, and generate heat islands. The cars will still kill one or two billion animals every year. The cars will still kill about a million people worldwide every year; one every 30 seconds.

It would be nice to have this energy used for something else than powering deadly inefficient cars.