When you are smoking, do you realize that you are unconsciously inhaling the harmful substances in cigarettes. There are more than 2,000 kinds of harmful substances in cigarettes, and the most important harmful substances are tobacco tar and carbon monoxide, of which the addictive substance is nicotine. The longer you smoke, the greater the amount of smoke, the greater the harm of smoking. Passive smoking is also harmful to your health. Smoking can cause lung cancer, coronary heart disease, bronchitis and emphysema in you and others around you. The dangers of active smoking: 1. shortens life expectancy by an average of 10 years 2. increases the risk of coronary heart disease by 10 years and increases the risk of coronary heart disease by two times. Increase the risk of death after coronary intervention by an average of 76%. 3.Increase the relative risk of cerebral infarction by 90%, and the risk of subarachnoid hemorrhage by 190%. 4.Increases the relative risk of sudden death by more than 3 times. 5.Increases the risk of peripheral vascular disease by 10-16 times. 70% of vascular atherosclerotic occlusions and almost all thrombo-occlusive vasculitis are associated with smoking. 6, increase the risk of aortic aneurysm, associated with the amount of smoking per day. Hazards of passive smoking: 1, comparable to the hazards of smoking 1-9 cigarettes per day. 2.Increases the risk of acute myocardial infarction by 25%. 3.Increases the risk of cerebral infarction by 25%. The benefits of quitting smoking: 1. The benefits of quitting smoking to the heart, blood pressure and blood system will be seen after just one day of quitting. Quitting for 1 year reduces the excess risk of coronary heart disease by half compared to continued smokers. 2.After quitting smoking for 5 years-15 years, the risk of stroke drops to the level of never smokers. 3.After quitting smoking for 10 years, the risk of lung cancer is reduced by 30-50% compared to those who continue to smoke. The risk of developing oral cancer, laryngeal cancer, esophageal cancer, bladder cancer, kidney cancer, and pancreatic cancer is reduced, and the risk of developing stomach ulcers is reduced. 4. After quitting smoking for 15 years, the risk of coronary heart disease was similar to that of never smokers. The overall risk of death returns to the level of never smokers. 5, Quit smoking coronary heart disease long-term risk of death reduced by 36% (statin reduced by 29%, B-blocker 23%, ACEI 23, aspirin 15%), therefore, quit smoking is the most effective way to reduce the risk of developing coronary heart disease. 6, quit smoking is the most economical measure to save lives, the cost of quitting smoking per life saved is $2000-6000 (antihypertensive treatment is $9000-26000, lipid-lowering treatment is $50000-196000). Therefore, smokers should quit for the sake of your health and the health of others! For those who still continue to smoke there is no need to consult me again, because, you have chosen to commit suicide and do not want to give up, as long as you do not endanger others, it becomes good for you.