This part is easy. Solar power means no drilling for oil in the Arctic. It means no Gulf Oil Spill, it means no more gasoline fumes. And unlike fossil fuels, the Sun isn’t going anywhere (we’re pretty sure).
Conventional cars use only 15% of the gasoline they burn for moving; solar cars blow that away with 90% efficiency. In theory, you could park your solar-paneled car in your driveway and use the energy it collects not just to charge its own battery, but to power your house.