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Nitrogen and oxygen in our atmosphere protect us from UV-C and more energetic radiation. Some of the oxygen turns into ozone thereby. Ozone protects us from UV-B. UV-A arrives at Earth's surface.

Ozone gas is found in the stratosphere of the atmosphere. It is not a uniform layer. Its thickness varies in gradation. Ozone is formed by the action of sun's rays on oxygen molecules.

However, the rate of ozone depletion is faster than its production. Depletion is caused due to CFCs(chloro flouro carbons) which are found in refrigerators, air conditioners and aerosols(used in spray cans).

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The thing which protects us from suns UV rays is the ozone. It is an allotrope of oxygen element.


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It depends on what rays are mentioned above. If UV rays are being mentioned, then the ozone is the answer.


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