The atmosphere is the gaseous covering above the Earth. It contains different gases like carbon dioxide, oxygen, and other gases to help living organisms like plants, animals, and humans sustain life. However, the upper region of the atmosphere has a low composition of oxygen; that is why it is possible to find the flying birds under the region of 200 meters of the Earth. The atmosphere that is part of the biosphere plays a specific role in protecting living organisms from the sun’s harmful ultraviolet radiation apart from providing them gases for respiration.