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1 _______. When the driver brakes, the resistance of the motor helps to slow down the car. At the same time, the energy from the wheels turns the motor which then functions as a generator, producing electricity to recharge the batteries. When the batteries are low, the petrol engine also drives the generator.
2 _______. The petrol engine shuts off when the car comes to a stop. When the driver presses the accelerator, the motor instantly starts the engine again. No energy is wasted from idling when the car is stopped.
3 _______. They do not require special fuel like hydrogen cars and, unlike electric cars, they do not need to be plugged in overnight to recharge the batteries. 4 _______.
Hybrid-electric vehicles (HEVs) use regenerative breaking.
HEVs have automatic start/shutoff.
HEVs are more efficient and pollute less than cars with only petrol engines.
However, they are heavy because of the weight of the batteries.