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  Ozone layer depletion

Ozone layer depletion:

Ozone is a form of oxygen (O3). In stratosphere (i.e., ozonosphere), ozone blocks out the sun’s ultraviolet rays and is a lifesaver.

Ozone as a natural sun block:

The electromagnetic radiation released from sun comprises ultraviolet radiation that is potentially injurious to most living things as it can damage DNA. The ozone layer screens out the sun’s injurious ultraviolet radiation. Even 1% decreases in the amount of ozone in the upper stratosphere causes a measurable raise in the ultraviolet radiation which reaches the earth surface. When there was no ozone at all, the quantity of ultraviolet radiation reaching us would be catastrophically very high. All living beings would suffer radiation burns, except they were underground, or in the sea.

In stratosphere, small quantity of ozone is continuously being made by the action of sunlight on oxygen. At same time, ozone is being broken down by natural procedures. The net quantity of ozone generally stays constant as its formation and destruction takes place at about similar rate. Though unfortunately human action has recently changed that natural balance. Some manufactured substances like chloro-fluro carbons and hydrochloroflurocarbons can destroy stratosphere ozone much quicker than it is created.

 

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