smoking is a very bad habit. many people smoke everyday and they are not aware of how bad smoking is. people may die younger because of smoking, they also waste their money on buying cigarette. researcher suggest that smoking can cause many serious diseases,smoking can cause many bad diseases such as cancer and heart disease. also smoking can harm body cells and increase the risk of stroke. smoking can damage the human body with many other diseases as well. doctors always recommend smokers to stop smoking as soon as possible.