Advertisements of tobacco and those of “smoking is harmful”are often seen
　　together. But there has been an on-going argument about whether or not
　　tobacco should be forbidden and made illegal. I have always believed that
　　smoking should be illegal for the following reasons.
　　
　　First, smoking does great harm to human health and causes many diseases.
　　It is reported that more than 70% of lung cancer sufferers are smokers, and
　　the average life-span of smokers is seven years less than that of non-
　　smokers. Moreover, it hurts not only smokers, but also the ones around the
　　smokers. Many researchers claim that breathing “second-hand smoke” may
　　be even more harmful than smoking.
　　
　　Second, many social problems and disasters can be attributed to smoking.
　　For instance, many wives cannot bear their husbands’ smoking all the time,
　　which causes many quarrels, or even divorces. Furthermore, the biggest fire
　　disaster in China, the Daxinganling fire disaster, was caused by a burning
　　cigarette end, and the cost of the resulting loss was unimaginable.
　　Last, smoking tobaccos is a main source of air pollution.A magazine said that
　　for every cigarette smoked each day,a whole tree is needed to clean the air.
　　In other words, smoking one less cigar every day equals planting a tree. It
　　is a brilliant contribution to the earth we are living on.
　　
　　In a word, all the above demonstrate that smoking harms yourselves as well
　　as your neighbors, pollutes the air we ourselves are breathing, and even
　　agitates the social peace. So, in my opinion, tobacco should be strictly
　　forbidden, and smoking should be made illegal.