OZONE DEPLETION:
Over the past few years, pesticides containing CFCs [Chloroflorocarbons]were wiely used around the world, now the levels have dropped although they are still used in some countries. The reason for scientists to try to find an alternative to CFCs containing agents is linked to the effects that they have on the environment.
When CFCs are realised into the atmosphere, they split and produced chlorine radicals which react with oxygen radicals in the atmosphere that would have otherwised combined with atmospheric oxygen to form ozone. The chlorine and oxygen radical produce ClO, which is a stable compound. Therefore the presence of CFCs reduce the production of ozone, when this process continues after sometime there happens to be more oxygen molecules than ozone molecules. This is called ozone depletion or simlpy the thining of the ozone. After some time ozone depletion results to what are known as black holes. The ozone protects us from the harmful UV rays and their absence allows UV rays to reach us. UV radiation causes health problems such as cancers.
The concerns over ozone depletion brought about different amendments such as the Montreal protocol amendment.

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