How sustainable is a solar powered car?

Answer 1

Solar powered cars are sustainable because panels work silently so they don't add to the noise pollution already on the road. Most importantly the energy is free, you don't have a dependence on foreign oil. The unfortunate downside is not having access to this energy after the sun goes down or during cloudy day's. We can store solar energy into the cars during a day and can use it at night or also in a cloudy days.

There are no legal electric cars available and it is unlikely there ever will be due to the amount of energy available from the sun over the area of a car.