Tobacco is carcinogenic It causes cancer of the mouth oral tract and the lungs In addiction it causes discoloration of the teeth and the fingers Not only does smoking affect those who smoke but it also affects the unborn babies in the case of pregnant women who smoke Passive smokers or those who inhale the smoke indirectly are also at great risk smoking weakens and clouds the brain and creates thirst of alcohol Smoking is also dirty and unhygienic Many smokers litter their precincts with ashes and cigarette butts