By farting
The higher up you are the lesser the air pressure in the atmosphere.
air grows thinner so it gives less pressure on the earth's surface
As the amount of air above us decreases...the air pressure decreases.
air grows thinner so it gives less pressure on the earth's surface
Increased altitude means decreased air pressure.
As altitude increases so air pressure reduces, until the limit of our atmosphere is reached. After which the vacuum of space is entered.
It equalizes the pressure between the middle ear and the atmosphere. This is what causes your ears to "pop" when you change altitude.
The change in pressure is highly affected by altitude.
The rate of change of air pressure as a function of increasing altitude decreases with increasing altitude.
The temperature decreases
All you have to do to reduce the boiling point of water is go to a higher altitude and boil it.