Today smoking is a widespread habit all over the world. Not only the old, the youth, but also middle school students have been engaged in smoking. Many of them think that smoking is a smart symbol.   However, smoking is harmful to one’s ,health. It contributes a lot of lung cancer, from which many people have died in the past years. It can also cause many other diseases. In a word, if you smoke, you do have a much greater chance of losing your health. Furthermore, scientific research shows that smoking is not only harmful to smokers themselves, but also a threat to public health, especially to women and children. Therefore, many countries have made laws forbidding smokers to smoke m public places such as cinemas, stations, hospitals, and so on . We know that health is the the capital of revolution. In the future, you may do innovation or make a big fortune like Ma Yun. But it will be nothing if you lose your health. So dear , I really suggest you should not smoke, it is not only good for you but for others who are around you. I hope everyone can have a good life. Give up smoking! If you don’t smoke, don’t start. Give up smoking for the sake of your health, for the sake of your family, and for the sake of the whole world.