Safety and your vehicle

What is the main purpose of a catalytic converter fitted to a car?

To make the engine sound louder
To reduce the harmful gases in the exhaust
Correct
To increase the car's top speed
To save the driver from checking the oil

Why?

A catalytic converter cleans the exhaust by turning harmful gases into less harmful ones, which cuts pollution. Rule 123 of The Highway Code reminds drivers of their duty to reduce their vehicle's impact on the environment, so keeping it working matters.

Highway Code rule 123

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