What is mean by Atmosphere ?
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An atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.
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The thick layer of air surrounding the earth is referred to atmosphere. Atmosphere plays a important role in the sustenance of life on the earth. It provides us certain gases such as Oxygen and Carbon dioxide which are necessary for human beings and plants respectively.
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