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Give reason :

The UV radiations are injurious.

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1. When ultraviolet (UV) radiation falls on the cells of living organisms it is absorbed in the DNA and proteins present in the nucleus. 

2. The high energy of UV radiations break the chemical bonds within these molecules. 

3. This results in damage to the skin cells and cause skin cancers of various types. 

4. High doses of UV-B radiations also cause inflammation of cornea called snow blindness, cataract, etc. The UV radiations therefore are injurious.

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