We all know it is becoming more and more important to protect our environment well.We should stop cutting down trees ,dropping litter everywhere and throwing waste before it is processed. It has caused lots of problems such as much rich land becomes desert;Rivers become dirty ;The air is becoming worse and worse ;The temperature is becoming hotter and hotter.So we must do something to change the situation.We'd better walk or ride bikes to work or go to school instead of driving a car,We mustn't use plastic bags.Our government must take some measures to prevent factories producing smoking etc.
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