电子课本网 第193页

第193页

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Human activities are one 
of the main reasons for it.As a result,more and more natural disasters happen such as floods,storms and forest fires.
Moreover, it causes the sea level to rise.And plenty of animals are in danger.The number of all kinds of animals is 
smaller and smaller. 
        So we must take action right away to save the Earth. First of all, we should use more clean energy in our daily 
life.Second,we should try to walk to school, take a bus or ride a bike instead of taking a car.Third, we should plant 
trees as many as possible.