which could the most serious problem in our world. That lead to ozonosphere to be thinned and our body would hurt by the Uv ray. Nowadays the cancer and various disease pose threat to human being. Moveover,with the increasing of population,government always put some chemical and fertilizer to the field in order to enable people to live well. Yet,it is not beneficial to our fitness. As a result , the soil will be damaged and the quality of the food cannot be guaranteed.Some measures must be taken to solve this kind of serious problem,which is not only to the government,but also indivials. In the first place, some relevant law and regulations should be promulgated to r