Smoking causes cancer, heart disease, stroke, and lung diseases (including emphysema, bronchitis, and chronic airway obstruction). For every person who dies from a smoking-related disease, 20 more people suffer with at least one serious illness from smoking. Worldwide, tobacco use causes more than 5 million deaths per year, and current trends show that tobacco use will cause more than 8 million deaths annually by 2030. Cigarette smoking is responsible for about one in five deaths annually.