Destruction of the ozone layer

In twenty first century, We have to face on serious environmental problem, called destruction of the ozone layer. The ozon layer, which is the layer of ozone composed of three oxygen in stratosphere, protects people from harmful ultraviolet rays. The layer absorb and cut off the ultraviolet rays or the other harmful substance. Now, the ozone layer has been kept destroying by chlorofluorocarbon(CFC). The chlorofluorocarbon is emitted from factories, refrigerators, and spray propellants. The more people keep emitting CFC, the faster the ozone destruction. If destruction of the ozone layer occurs, the layer have holes, so-called Ozone holes. Under the condition, people absorb directly harmful ultraviolet layer, and have harmful affects on human body. As a result, the bad affect could cause a skin cancer or cataract. Moreover, it could be badly influenced on grain harvest. To avoid the environmental crisis, we all need to reconsider our life style using products which produce harmful substance for environment such as the ozone layer. In this century, individual effort must be important to live safety not only for us but also our children.