匿名
匿名 發問於 教育及參考書其他 - 教育 · 1 十年 前

Air pollution

The content of the Air pollution must be clear.Please let me know what is the cause of the air pollution,which country helped to improve the air quality?How can we improve the air quality?Will the cause of the air pollution harm us? What did the government do to improve the air quality around us?

Please answer me with a website.Must be website!

更新:

Please answer the question in Chinese,or I won't give mark as soon as possible.

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