A hybrid car is one that uses more than one means of propulsion. At the moment, that means combining a normal petrol or diesel engine with an electric motor.
The chief advantages of a hybrid are that it uses less fuel and emits less CO2 than most conventional non-hybrid vehicles.
Because of this, owners also get extra benefits in the shape of lower rates of road and company car tax, as well as possibly avoiding congestion charges.
- See more at: http://www.whatcar.com/car-news/hybrid-car/1204809#sthash.HuK1U9RL.dpuf