In the biting cold of a winter morning, we would prefer to lie curled up, wrapping ourselves in the comfort of a thick blanket. If necessity compels us to get out of our home, we would wear a pullover to warm ourselves. The pullover and blanket help us keep the chill at bay. While Man has invented clothing to adapt to the change of seasons and climate, our earth has a natural blanket called atmosphere.
Atmosphere protects our planet from harmful ultraviolet rays of the sun. It acts like a blanket around the earth. It not only protects our planet from the sun but also provides the conditions necessary for the sustenance of life on Earth. Life exists on Earth because of atmosphere.
Dry air in the atmosphere consists of 78 per cent nitrogen, 21 per cent oxygen, 1 per cent argon and other inert gases, such as carbon dioxide. Other than these gases, there are many other gases in the atmosphere too. The ozone layer of the earth’s atmosphere plays an important role in preventing the ultraviolet (UV) radiation from reaching the planet’s surface.
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