Column of lighter air is the term used to describe the atmosphere at higher altitudes, where there is less air pressure and therefore less oxygen available for breathing. This makes it harder for individuals to breathe at higher altitudes, as their bodies have to work harder to take in enough oxygen to sustain their activities. People who are not acclimated to higher altitudes may experience symptoms such as shortness of breath, fatigue, and dizziness due to the decreased oxygen levels in the air.
