Smoking is a cause of physical deterioration and premature death. Smoking is a major risk factor of cardiovascular disease, ischemic stroke and arterial disease smoking is also a major cause of lung cancer. People who smoke are aging balding gray hair, wrinkled face, bad breath, tooth decay and teeth black. Smoking is the largest cause of preventable death in the world. smokers can undermine the health of non-smokers in some environments.Every year there are 400,000 deaths per year from smoking.