You can see smokers everywhere in public places. You can find that most of them are young people, even middle-school students. It’s said that nearly half of the population are smokers in China. Why do so many people smoke? Some people think that smoking is a kind of fashion; some think that smoking is a pleasure; while others believe that they can refresh themselves by smoking. In fact, smoking is a very bad habit. It does great harm to people’s health and causes a lot of diseases, such as lung cancer. And smoking is a waste of money, too. Besides, many fires are caused by careless smokers. So I suggest that you should give up smoking if you are a smoker.