Solar/battery-powered cars? If these cars are so efficient and will not use up as much gas, plus they are environment safe, why are they SO expensive? Gas is part of the trouble we%26#039;re having in the middle east, so why not help get rid of gas? I don%26#039;t understand why there are so many advertisements and proposals to get rid of the use of harmful pollutants such as gas, yet sellers will raise the price JUST because it will help the environment?