Nowhere in the world has the issue of tobacco been so much debated as in

　　our society. Nowadays,tobacco is more harmful than drug to people’s health,

　　therefore many people think that smoking isn’t banned that is a direct and

　　primary reason to induce this kind of problem. The above point is certainly

　　true; this essay will outline three reasons.

　　The main reason is that tobacco is a silent killer to smokers. Tobacco is kno-

　　wn to be the probable cause of some 25 different diseases, and for some,

　　such as lung cancer, bronchitis and emphysema, it is the main cause. Accord

　　ing to a WHO report four million people die yearly from tobacco-related dise-

　　ases, that is one death every eight seconds. Tobacco is significantly become-

　　ng a greater cause of death and disability than any other single cause.

　　Another reason is that more and more young people are under 18 years old

　　who smoke cigarette have been blinded by the deceit of tobacconists.Tobacco

　　among adolescents remains stubbornly persistent. Smoking among adolesce-

　　nts rose in the 1990s in several developed countries， such as China,Vietnam

　　and Thailand . While new markets are being opened by the tobacco industry

　　actions, old markets have not been closed.Tobacco is a global threat.Last bu

　　t not the least reason is the increase in cigarette smuggling. Because of toba

　　-cco smuggling, the legal retailing and distribution systems are badly affected,

　　and faced with increased lawlessness and heavy tax losses. This behavior

　　severely affects the economy.

　　In conclusion, smoking should be banned, because of the hazard it poses to

　　people’s health