electric cars
... Because of this problem motor vehicle industries have come up with the idea of Hybrid Electric cars or HEVs. What are electric cars you ask? Hybrid electric vehicles (HEVs) combine the internal combustion engine that resembles normal vehicles today; it also comes with the battery and electric motor of an electric vehicle, resulting in twice the fuel economy of conventional vehicles. ... GM (General Motors) has already developed a vehicle similar to a hybrid electric car.