Scientific evidence confirms that smokers face significantly increased risks of death and illness from numerous cancers, heart disease, stroke, atherosclerosis, abdominal aortic aneurysm, emphysema and other respiratory diseases. Smoking also causes blindness, dental problems, erectile dysfunction, reduced fertility in women, sudden infant death syndrome, contributes to osteoporosis and increases the risks of pregnancy complications including premature birth, low birth weight, still birth and infant mortality.