That is correct. Nitrogen which is responsible for Earth's blue sky is the majority of occupying gases. That is followed by oxygen. Oxygen is 21 percent. Oddly, the percentage of oxygen in human respiration is 21 percent. If a person's lungs are less than optimal the blood levels of oxygen drop and then there are complications and potential danger to life.
The red pie chart are the trace gases of Earth's atmosphere that provides for the planet's climate. Carbon dioxide is the majority gas of the trace elements. The trace elements are only 0.1 % of Earth's atmosphere. That fact lends to the understanding that minimal increases in greenhouse gases causes an incredible change in Earth's climate.
Kindly, think about that.
One gas that is rarely discussed is water vapor. It is classified as a greenhouse gas.
...Water vapor is unique in that its concentration varies from 0-4% of the atmosphere depending on where you are and what time of the day it is. In the cold, dry arctic regions water vapor usually accounts for less than 1% of the atmosphere, while in humid, tropical regions water vapor can account for almost 4% of the atmosphere. Water vapor content is very important in predicting weather....
The level of gases of Earth's atmosphere needs to remain benevolent and stable. There is no option to changing the balance. It sustains life just fine.
