The development of the present atmosphere has taken place in the following three stages:
1. First stage: In this stage of development of the present atmosphere, the primordial atmospheric gases decreased.
2. Second stage: In this stage, steam and water vapor was emitted from Earth, which contributed to the development of the atmosphere.
3. Third stage: In this stage, the structure of the atmosphere was modified by the photosynthesis process of the biosphere and molecular composition of atomic gases.
