Why is the atmosphere essential for life?

The atmosphere is essential for life because it maintains an appropriate climate for the sustenance
of life by carrying out the following activities:
(i) Atmosphere keeps the average temperature of the Earth fairly constant during day time.
(ii) It prevents a sudden increase in temperature during day time.
(iii) It also slows down the escape of heat from the surface of the Earth into outer space during
nighttime.

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