What is the purpose of the active carbon filter in the Audi A2?

I've heard that the Audi A2 has an active carbon filter, but I'm not sure what it does or why it's necessary. Can you explain?

The active carbon filter in the Audi A2 helps to trap and absorb harmful gases and pollutants before they can enter the cabin of the car.

It is an important component for maintaining good air quality inside the car, especially in urban areas with high levels of pollution.

Regularly replacing the active carbon filter is part of routine maintenance for the Audi A2, and it's important for the health and comfort of the passengers.