But what on earth leads to these natural disasters ? Of course , natural variation plays a very important role . However , more and more people become aware that those disasters have much to do with what we have done to the earth . We have cut down too many trees . We have badly polluted the environment . As a result , nature goes up to revenge itself on us .

　　Considering the great destruction of natural disasters , it is urgent for us to do our best to protect our environment so as to prevent the natural disasters . Besides , when natural disasters really happen , firstly , we must keep a clear head and try to save ourselves and help others ; secondly , we must unite together and have a firm belief to get through disasters . Only in this way can we conquer disasters .

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