Why is Tibet short of oxygen?

1, high altitude: Tibet is located on the Qinghai-Tibet Plateau, with an average altitude of more than 4,000 meters, and some areas have an altitude of more than 5,000 meters. At high altitude, the air pressure is low and the air is thin, resulting in relatively low oxygen content. Compared with low altitude areas, people are more likely to feel the symptoms of hypoxia at high altitude areas.

2. Air pressure change: As Tibet is located on the plateau, the air pressure gradually decreases with the elevation. The decrease of air pressure will lead to the decrease of oxygen partial pressure, which will affect the amount of oxygen inhaled by human body. The human body needs to breathe more at high altitude to get enough oxygen to meet the needs of the body.