Dave was taking part in an ecological event where he has been asked about the environmental effects of cars. Choose the correct words to complete his answers.

Choose the correct option.

Dave, 16

Burning wood is bad for the environment, it releases carbon monoxide. Gasoline engined cars [burn|is burning|burns] fossil fuel via a number of spark plugs. Thousands [of|off|in] small fires push the vehicle along, and they are releasing a gas that warms the environment. I think that soon cars will be banned and electric cars will become common, and they [will be used| will used|will use] by sensible people. A new green energy [generation|generating|generate] will appear soon that will have access to alternative energy sources.