The atmosphere, like the skin of any organism, protects and nourishes this living planet. It protects against cosmic radiation, to which life is very sensitive; regulates the surface temperature through the greenhouse effect; allows the circulation of nutrients and other natural elements; is part of the water cycle; and is the layer where we and many other living things live, develop, reproduce, and evolve. Therefore, suddenly, the atmosphere is no longer something that is up there or outside, but it is the medium that keeps us alive. “Let’s go and play outside” is an expression that is used less and …
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