At present, there is sufficient evidence that smoking can cause a variety of malignant tumors, respiratory diseases, cardiovascular and cerebrovascular diseases, and have serious adverse effects on human reproductive function, pregnancy outcome, fetal and child development.
According to the report of the World Health Organization, the average life expectancy of smokers is shorter than that of non-smokers 10 years.
For teenagers, the harm caused by tobacco smoke is even more worrying.
Because teenagers are in the period of growth and development, smoking has different degrees of influence on his skeletal development, nervous system, respiratory system and reproductive system development. Moreover, due to the immature development of various systems and organs in adolescence, the resistance to harmful factors in the external environment is weak, and it is easier to absorb toxic substances, thus damaging the normal growth of the body and the health of organs.
First of all, smoking damages the brain and affects the intelligence of teenagers. Tobacco contains nicotine, a strong addictive substance, which is also very toxic to the brain, which will make students' memory decline, listlessness and academic performance decline.
Second, smoking affects the normal development of teenagers, especially the level of sex hormones. Smoking reduces testosterone secretion by 20%-30%, leading to sperm reduction and deformity; Delaying menarche in girls, causing menstrual disorder.
Third, smoking leads to the early onset of related diseases. Smoking can advance the onset age of coronary heart disease, hypertension and tumor.
Relevant data show that the younger the smoker, the more serious the harm to health. If people who start smoking at the age of 15 are 55% higher than those who start smoking after the age of 25, the risk of death is 1 times that of non-smokers.
Fourthly, smoking can also lead to amblyopia in teenagers, resulting in "tobacco-induced amblyopia", which is characterized by unclear vision, changes in visual field and abnormal color vision. However, tobacco toxic amblyopia develops slowly and is easily ignored by us.
In fact, in addition to smoking, exposure to second-hand smoke can also cause serious damage to human health, especially the health of teenagers. For example, if children are exposed to secondhand smoke, it will lead to respiratory infection, bronchial asthma, decreased lung function, acute otitis media and various childhood cancers.
In particular, there is no so-called safe level of exposure to secondhand smoke, even if the exposure time is short, it will do harm to our human health.
Adolescence is a critical period for the formation of behavioral habits.
The survey results show that more than half of smokers in China started smoking before the age of 20. Teenagers are in an important period of physical and mental development, and they have a strong curiosity, and their understanding of the long-term chronic harm caused by smoking is not enough. Once they start smoking, it is easy to form a bad habit of lifelong smoking, which will cause lasting harm to their health.
Therefore, a key point of tobacco control is to persuade old smokers to quit smoking, and more importantly, to let teenagers quit smoking.
Only by reducing teenagers' attempts or exposure to tobacco and e-cigarettes and blocking this link can we effectively reduce the number of new smokers and the overall smoking rate, and achieve the goal of "Healthy China Action (20 19-2030)" that the smoking rate of people over 0/5 years old will be reduced to 20% by 2030. Target.