As we listen to a fine Johann Strauss waltz, we see the hustle and bustle in a city - through the lense of an infrared cam: people walking around, waiting at bus stations, driving bikes, pushing baby carriages. Most of the people fart, as we can clearly see through the infrared camera. We also see busses and cars and motorbikes with emissions. Everything is producing emissions - except for the new smart electric drive. We see the car in the end, accelerating without producing any emissions.