How does the Audi A2's eco-friendly technology reduce emissions?

I'm interested to know how Audi A2's innovative technology contributes to its eco-friendly features. Can anyone provide a comprehensive explanation?

The Audi A2 uses a lightweight aluminum body, which reduces its weight and therefore reduces fuel consumption. This leads to lower emissions and a more eco-friendly driving experience.

The A2 also utilizes a regenerative braking system, which captures and stores energy that is normally lost during braking. This energy is then used to power the vehicle, resulting in reduced emissions and improved fuel efficiency.