Smoking has three major hazards: 1) It can directly and chronically poison life. 2) It can destroy the nutrients of human body. 3) It can induce various diseases. But the state pays taxes on this, enterprises need to survive and citizens need moral support. I believe everyone knows that the harm of tobacco is one of the most serious public health problems in the world today, and it is also the biggest risk factor facing human health. At present, the total number of smokers in the world has exceeded 654.38+0.3 billion, and nearly 5 million people die from smoking every year. For this reason, in1987165438+10, the United Nations World Health Organization suggested that 1988 should be designated as the first World No Tobacco Day, and then it should be fixed as May 3 1 day every year. The purpose of this activity is to warn the world that smoking is harmful to health and call on people to quit smoking. Create a healthy living environment for mankind. Secretary 1 14 All rights reserved. So how harmful is tobacco? According to research, nicotine contained in cigarettes can kill a mouse, while nicotine in a pack of cigarettes can kill a cow. Smoking a pack of cigarettes a day is equivalent to inhaling 50-70 mg of nicotine. If you take these doses at once, people will be killed. Besides nicotine, about 5,000 compounds produced when cigarettes are lit are the chief culprit of cancer. In a statement released this year, the World Health Organization pointed out: "Today, tobacco has become the second biggest killer in the world. The damage caused by smoking is more serious than that caused by SARS and the recent tsunami. If the current trend is maintained, by 2020, 654.38+0 billion people will die prematurely because of smoking. " Since tobacco is so terrible, why do so many people smoke? There are two main reasons: first, nicotine contained in tobacco is addictive, which makes people dependent and difficult to quit; Another reason is that most people have not regarded smoking as an ugly habit that harms others and themselves. On the contrary, they think it is a very fashionable and unique thing. Therefore, smokers are snowballing and people are relying on it more and more. However, the tobacco dealer said, "The cigarettes we produce are for those who have no knowledge, young people and stupid people." It is also the largest consumer of cigarettes. More than one third of the cigarettes in the world are smoked by people in China. Teenagers account for a large proportion of smokers in China. For teenagers, the harm of smoking is far greater than expected, which will not only lead to many diseases, but also affect the growth and development of bones. This is because teenagers are in the stage of rapid physical growth and development, and the organs and systems of the body are not yet mature. The resistance to all kinds of toxic substances is not strong, and the poison of smoke is deeper, which may even lead to premature aging and early death. Smoking may also make teenagers develop bad habits, induce bad behavior and even lead to crime. Anti-smoking has become an urgent task in China. Therefore, the Chinese government has put forward the overall goal of reducing the total number of smokers in China by 1. 1 billion in the next 25 years. Secretary 1 14 All rights reserved. In order to actively respond to the government's call and for our own health, we call on all students to consciously stay away from cigarettes and persuade their relatives and friends who smoke to give up smoking as much as possible. After all, cigarettes are harmful to us. After all, the air without tobacco will be fresher, and the life without tobacco will be more gorgeous! As we all know, smoking is harmful to health. . Different cigarettes release different chemicals when they are lit, but the main chemicals are tar and carbon monoxide. The harmful substances produced by cigarette ignition can be roughly divided into six categories: (1) aldehydes, nitrides and olefins, which have irritating effects on respiratory tract. (2) Nicotine can stimulate sympathetic nerve and cause intimal injury. (3) Amines, cyanide and heavy metals are all toxic substances. (4) Radioactive substances such as phenylpropyl pyrene, arsenic, cadmium, methylhydrazine and aminophenol. These substances are carcinogenic. ⑤ Phenolic compounds and formaldehyde, etc. It has the effect of accelerating cancer. (6) Carbon monoxide will reduce the ability of red blood cells to transport oxygen to the whole body.
Tobacco smoke contains at least three dangerous chemicals: tar, nicotine and carbon monoxide. Tar is a mixture of several substances, which will be concentrated into a viscous substance in the lungs. Nicotine is an addictive drug, which is absorbed by the lungs and mainly acts on the nervous system. Carbon monoxide reduce that ability of red blood cells to deliver oxygen to the whole body.
A person who smokes/kloc-0.5 to 20 cigarettes a day is four times more likely to develop lung cancer, oral cancer or laryngeal cancer and die than a non-smoker. The mortality rate of esophageal cancer is four times higher than that of non-smokers. The risk of dying from bladder cancer is twice as high; The risk of dying of heart disease is twice as high. Smoking is the main cause of chronic bronchitis and emphysema, and chronic lung disease itself will increase the risk of pneumonia and heart disease, and smoking will also increase the risk of hypertension. Harm of various organs:
Oral cavity and throat
Cigarette smoke (especially the tar contained in it) is a carcinogen-that is, it can cause cancer in the tissues it touches, so cancer can occur in any part of the smoker's respiratory tract (including the mouth and throat).
Heart and arteries
Nicotine can make the heart beat faster and blood pressure rise. Tobacco smoke may be caused by carbon monoxide, which seems to promote the accumulation of atherosclerosis. This condition is one of the causes of many heart diseases. Heavy smokers are much more likely to die of a heart attack than non-smokers.
esophagus
Most smokers like to swallow a certain amount of cigarettes, so the digestive tract (especially the esophagus and pharynx) is at risk of cancer.
lung
Fine hairs arranged in the airway of the lung usually exclude hydrogen foreign bodies from the lung tissue. These villi will constantly sweep the particles in the lungs into phlegm or mucus and excrete them. In addition to causing cancer, the chemicals in tobacco smoke will gradually destroy some villi and increase mucus secretion, so there are chronic diseases in the lungs and bronchitis is also prone to infection. Obviously, the "smoker's cough" is due to the impairment of the mechanical efficiency of lung cleaning, so the amount of sputum has increased.
bladder
Bladder cancer may be caused by inhaling carcinogenic chemicals contained in tar, which are absorbed by blood and then sampled in urine.
Tobacco smoke contains at least three dangerous chemicals: tar, nicotine and carbon monoxide. Tar is a mixture of several substances, which will be concentrated into a viscous substance in the lungs. Nicotine is an addictive drug,