What technology is used in Audi cars to reduce carbon emissions?

I want to learn more about the eco-friendly features in Audi cars. Specifically, what technology do they use to decrease their carbon footprint and contribute to a greener environment?

Audi uses a combination of gasoline and electric power in their plug-in hybrid models, which significantly reduces carbon emissions compared to traditional gasoline engines.

The Audi e-tron series uses regenerative braking technology to capture energy that would otherwise be lost while braking, helping to power the car and decrease carbon emissions.