Vehicles produce CO2 when they use fuel. The amount of CO2 produced is directly linked to how much fuel it consumes. Excess levels of CO2 can be harmful to humans and the environment.

Volkswagen’s new Polo GTI is a big step up from the car it replaces, and not just because it is no longer hampered by the supercharged and turbocharged 1.4-litre engine and DSG-only gearbox.

Vehicles produce CO2 when they use fuel. The amount of CO2 produced is directly linked to how much fuel it consumes. Excess levels of CO2 can be harmful to humans and the environment.