WHY IS THE AIR SO THING ON MOUNT EVEREST?

The air on Mount Everest is thin primarily due to its high altitude, which is over 29,000 feet (8,848 meters) above sea level. At such heights, the atmospheric pressure is significantly lower than at sea level, resulting in a reduced concentration of oxygen molecules in each breath. This decrease in air density makes it challenging for climbers to obtain sufficient oxygen, leading to altitude sickness if proper acclimatization isn't practiced.