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1、 We all know that clean air is We all know that clean air is important to good health.important to good health.Wherever Wherever you go and whatever you do,you are you go and whatever you do,you are always surround by a sea of gases always surround by a sea of gases that we call air.that we call air
2、.But look at the sky But look at the sky,you can see that dense smoke is,you can see that dense smoke is released from the high and big released from the high and big chimneys.In fact,air pollution is chimneys.In fact,air pollution is a very serious problem the whole a very serious problem the whole
3、 world is facing.The region has been world is facing.The region has been seriously polluted by harmful smog.seriously polluted by harmful smog.pictureHow to change this condition?Now cities are closing down or modernizing some factories to bring it under control.You know trees can absorb some harmful gases.So planting trees is no doubt an effective measure.People are happy with the measure taken by the government.And I believe as long as every citizen makes join efforts,the day will come soon when people will take in only clean air!Thank you !