Electric vehicles, hybrid vehicles, compressed air vehicles, and improving conventional vehicles are described as environment friendly automobiles. Electric vehicles are powered directly from an external power source, stored electricity from an external source, or an onboard generator. Hybrid vehicles combine an internal combustion engine with electric motors. Compressed air vehicles use compressed air to power their engines instead of gasoline. Improving conventional vehicles involves using renewable fuels like biodiesel, compressed natural gas, ethanol or improving fuel efficiency. Environment friendly vehicles help reduce pollution and protect the environment.