Smoking is a kind of pollution. It pollutes air around us. It does great harm to people's health and it can lead to much illness. And many people die from smoking each year. Smoking is bad not only for smokers but also for non-smokers, especially for children.

In a word, smoking is a bad habit. I hope all the smokers can give up smoking for themselves and also for the people around them. Let's enjoy clean and fresh air together.

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吸烟是一种污染，它污染着我们周围的空气。它对人们的身体极为有害，并导致很多疾病。每年有很多人死于吸烟。吸烟不仅对抽烟者有害，而且对于不抽烟的人，特别是儿童也很有害。

总之，吸烟是一种坏习惯。我希望所有的烟民们应该为自己也为身边的人戒烟。让我们共享清新的空气吧。