Green energy is not too expensive (depending upon where you live) that is a complete and utter fallacy. There are a number of places in the US and countries across the globe where renewable energy is already at grid-parity (april 2011). While this is clearly an excellent topic for a hub, as a simple case in point Hawaii has reached grid-parity.
Personally, I believe that electric cars aren't the answer to having a fuel efficient vehicle. They are quite a bit more expensive than gasoline or diesel. I believe the car of the future is compressed natural gas. Natural gas is very clean burning and is much less expensive than diesel and gasoline. Check out http://www.naturalgas-cars.com/ and http://www.naturalgas-vehicles.com/