It has been estimated that up to three million people die each year as a result of air pollution, much of it coming from motor vehicles.
बहुतेक मोटार गाड्यांतून, नायट्रोजन ऑक्साईड आणि कर्करोगास कारणीभूत असलेले पदार्थ बाहेर पडत असतात.