How smoking kill you?

half of adult smokers it isn't a question of if smoking will kill them but how. Ask any smoker what smoking's greatest killer is and they'll likely tell you it's lung cancer. They're wrong. The correct response would have been circulatory or cardiovascular disease.
The harmful effects of smoking do not end with the smoker. Women who smoke during pregnancy are more likely to have babies with a low birth weight, a leading cause of death among babies. Nonsmokers are affected by secondhand smoke, also known as environmental tobacco smoke, which is smoke from other people's cigarettes. Each year, secondhand smoke kills about 3,000 nonsmokers in the United States by lung cancer. It also causes up to 300,000 children to get infections of the lower airways and lungs. In addition, there is some evidence that secondhand smoke may increase nonsmokers' risk of getting heart disease.