How does Audi A7 help reduce emissions and improve fuel efficiency?

I'm a car enthusiast who's interested in the environmental impact of cars. I've heard that Audi A7 is known for its sleek design and high performance, but I'm curious about its efforts towards sustainability. What sets Audi A7 apart when it comes to reducing emissions and increasing fuel efficiency?

Audi A7 utilizes a start-stop system that automatically turns off the engine when the car is stationary, reducing idling time and thus emissions. This feature is particularly helpful in city driving and can save fuel in the long run. As for emissions, Audi A7 has a selective catalytic reduction system that converts harmful nitrogen oxides into harmless gases, significantly reducing emissions from the car.