Causes Of Ozone Layer Depletion
One of the most serious problems faced by the Earth is the depletion of ozone layer. It is also one of the reasons that cause global warming. The ozone is a colourless gas that found in the stratosphere of the upper atmosphere. The ozone layer is about 17-25 kilometers above the Earth. The layer of ozone gas is a layer which protects us from the ultraviolet radiations which is harmful from the sun. The ozone layer contains high concentrations of ozone molecules (O3) that absorb ultraviolet (UV) radiation and shield organisms from its damaging effects. Ultraviolet radiations are high energy electromagnetic waves which emitted by the sun. If the Ultraviolet Radiations enter the atmosphere of the Earth can lead to many types of environmental issues …show more content…
Chlorofluorocarbon is chemicals found mainly in spray aerosols heavily that used in the industrialized nations for much of the past 50 years. They are the primary culprits in ozone layer breakdown. Chlorofluorocarbon is highly stable and unreactive. It can remain unchanged for over 100 years and it is able to disperse to stratosphere and affect ozone layer.
When the chlorofluorocarbons reach the upper part of atmosphere, they expose to the ultraviolet rays. Ultraviolet radiations in the stratosphere break down the chlorofluorocarbons, releasing chlorine atoms. The chlorine atoms react with ozone molecules to form chlorine monoxide molecules which then combine with oxygen atoms to reform chlorine atoms again and releasing oxygen molecules. The chlorine atoms continue to break down more ozone. One of the atom of chlorine will destroy more than a hundred thousand of ozone molecules before finally removed from the atmosphere which is according to the U.S. Environmental Protection Agency. Since the mid of 1980s, the ozone layer above the Antarctic has been particularly impacted by pollution. This low temperatures region will speed up the conversion of chlorofluorocarbons to the chlorine. When the sun shines for a long periods of the day in the southern spring and summer, the chorine will react with the ultraviolet rays and destroying the ozone on a massive scale which is up to 65%. This is what some of the people mistakenly refer to as the ozone hole. The ozone layer has deteriorated by about 20% in the other
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