The air is different as you move greater and higher in the ambiance. The air will get "thinner" as elevation climbs mainly because you will discover fewer air molecules up there. Mountain climbers frequently need to use canisters of oxygen because they climb earlier mentioned three,800 meters (twelve,five hundred feet) https://www.dailypioneer.com/2025/page1/smoke-smell--unruly-passenger-affects-ai-flight-service.html