大学英语四级考试英语作文范文：吸烟的危害

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            “Why do you want to smoke?”Many people often ask questions like this.In recent years,there is a general tendency to more and more children also learn to smoke.They don't know the dangers of smoking,just think that smoking is cool, it's a trend.From the picture,we can come to a conclusion,smoking is equal to chronic suicide.
            It is well known that a cigarette contains many chemical substances such as tar and nicotine.Burning cigarettes can produce certain poisonous substances.Therefore,smoking can harm not only smokers but also non-smokers around them.On the one hand,the hazardous chemicals will do harm to smokers’ lung cells and blood circulation,which can shorten their lifespan.On the other hand,non-smokers exposed to second-hand smoke are at high risk of many health problems.
             To be brief,smoking is no less than chronic suicide,which destroys  the health both smokers’ and people around them.People should try their best to give up smoking,for their own health, for the family.