Nowadays, the pollution of the Earth is more and more serious and becoming one of the most serious problems of the world. It is our duty to save our earth. How can we prevent our earth from polluting? firstly, donnot threw garbages at the places. Because it will pollute the environment. Secondly, donnot let the polluted water get into the river. Because it will kill fishes. We just have one earth. Please save her!
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