The layer above the troposphere is called as Stratosphere in which a separate layer has been formed at a height between 15 and 30 kilometers from the sea level. It is called as ozono-sphere. Ozone (O3) is a gas which has the capacity to absorb large proportion of ultraviolet radiation and so the biosphere has been developed on land surface and water bodies. This ultraviolet radiation is very much toxic for the organic matter. The layer of ozone is getting depleted due to emission of gases from the industries and mainly the cooling industries.

Dissociation of Chloroflurocarbons

The chlorine atoms released by the dissociation of chloroflurocarbons (CFCs) are responsible for the depletion of the ozone layer. The release of CFC is confined to many activities which includes refrigeration, air conditioning, extinguishing fires, cleaning solvents in industries, blowing agents in plastic industries and solvents used in the paint industry. It has been found that one chlorine atom is capable of destroying up-to one million ozone molecules.

If the above mentioned activities continues for a longer period of time, then the natural filter of ozone layer will be totally lost and destroyed. By minimizing the use of ferrous and halogens the depletion of ozone can be reduced. Also, by using Eco-friendly chemicals, CFC can be replaced and ozone layer depletion can be curbed up to some extent. However it should be noted that Eco-friendly chemicals are expensive and hence the cost of production of cooling equipments will be gradually increased. Finally by imposing a regulatory ban on the use of refrigeration and air-conditioners, the formation of CFC can be reduced and the depletion of ozone layer can be put under control.