A. 10% of the air molecules in the atmosphere
B. 25% of the air molecules in the atmosphere
C. 50% of the air molecules in the atmosphere
D. 75% of the air molecules in the atmosphere
✅ The correct answer is option C.
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly 50% of the air molecules in the atmosphere.
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly 50% of the air molecules in the atmosphere.