The atmosphere is essential for life because of the following reasons:
1. The atmosphere constitutes of various main gases like O2, N2, and CO2
2. Photosynthesis is due to earth’s atmosphere
3. The constant temperature of the earth is the cause of the earth’s atmosphere
4. Processes like respiration, burning, and combustion are due to the atmosphere
5. The atmosphere is the main reason to restrict UV rays into the earth.