21.   Hybrid systems are cleaner than gas engines because they switch back and forth automatically between a gas engine and an electric motor.

22.   The hybrid system uses a gasoline engine, electric motor and electric generator to achieve nearly twice the fuel efficiency of conventional gasoline engine cars, Toyota said.

23.   Toyota Motor Corp. unveiled Friday a minivan for the Japanese market that is powered by a hybrid fuel system, a combination gasoline engine and electric motor.

24.   When condition demands, the hybrid system draw electricity from the nickel-metal hydride battery to drive the vehicle.