In 100 years,because of the more serious pollutions,there will be more disasters.Sych a rapid development prouces more and more waste,which goes into the water,the soil and the air.The number of people killed by the disasters will be about 400% more.Step bAy step the serious poluutions will destroy our eath.And the earth,there will be more pollutions,so we should saving the earth.we can use less a peice of paper,and care the earth resources.For example,we can care the grasses and flowers.