Force of air acting on one unit area is called air pressure or atmospheric pressure.
Air volume on the earth’s surface is greater than on the top of mountains.
Therefore, the air pressure of the earth’s surface is Higher than on the top of mountains.
We are familiar with air around us. We do not feel that we are being pressed by air because air applies equivalent force on us from all directions. The air pressure inside our body is equal to the air applies outside of it. lf air pressure change suddenly, for example, when we are in a tall elevator or on a high mountain, we will feel pain in the ears. This is because the air pressure inside our body becomes stronger than the external air pressure. The solution is to hold your nose, close your mouth and blow gently or swallow hard to adjust the air pressure inside our body to be equal to that outside. Than we will feel better.