Question

Why does the percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere?

Answer 1

The percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere because these elements are constantly used by living things. However, these elements go through a cyclical process that assures they are returned to the atmosphere via diverse processes. The biogeochemical cycle refers to the cyclic process of consuming various elements and returning them to the atmosphere.