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Now, the air are polluted. This is some reason, first there are many factory so the polluted air might come out from some factory. Second, the fault is people, they throw rubbish on the streets or cut down all the trees. That's only one of many reason of polluted air. If we protect the enviroment, we can have a fresh air and a better life. All we have to do is grow up as much trees as you can, don't throw rubbish on the streets and try to recycle the things that able to. That's all we have to do to have a better life and fresh air

Chị ơi, e mới lớp 6 nhưng mà cj cứ yên tâm bởi bài lm của e vì chương trình e đg học là chương trình cấp 3 lận nên cj yên tâm nha chị! chúc chị học tốt!!