They can undoubtedly be good and depending on the source of energy can be significantly better. Initially, an internal combustion engine, maximum 40% efficient. About 80% percent of an electric motor is efficient. It protects the environment from pollution
Electric cars are almost four times skilled as conventional cars. In a conventional car, about 80% of petroleum glazed gas is lost in potential heat dissipation, friction, running the engine while sitting in the car.