Numerous indisputable scientific evidence shows that smoking and secondhand smoke exposure (passive smoking) seriously harm human health. The world health organization (WHO) statistics show that the number of deaths from smoking each year around the world as much as 6 million, namely every 6 seconds one people die from smoking related diseases, now half of smokers will early death due to smoking. The number of non-smokers who die annually from secondhand smoke exposure is about 600,000. China is the world's largest producer and consumer of tobacco, and smoking has a particularly severe impact on people's health. According to the survey, there are more than 300 million smokers in China, and about 740 million non-smokers suffer from the hazards of second-hand smoke. Each year from smoking related diseases caused by the death toll at more than 1 million, such as the smoking prevalence is not controlled, to 2050 deaths every year will break 3 million, become people's lives and health and social economic development and bear.
What are the harmful substances in tobacco smoke?
The Chinese smoking harm health report pointed out that tobacco smoke contains over 7000 kinds of chemical components, which have found hundreds of ingredients harmful to human body, including at least 69 species of carcinogens (polycyclic aromatic hydrocarbon, N - nitroso amines, aromatic amine and formaldehyde, 1, 3 - butadiene), a variety of harmful gases, carbon monoxide, nitrogen oxide and ammonia, hydrogen sulfide, hydrogen cyanide), a variety of heavy metal and radioactive substances (cadmium, lead, mercury and cobalt, antimony, thallium, lead - 210, polonium - 210), and lead to the nicotine in tobacco dependence.
These chemical names may be confusing, but what are they? Look at the picture below. The smoke contains batteries, candles, pesticides, detergents and car exhaust! When you are smoking, think about the toxins that are entering your body.
Harmful substances in tobacco smoke
2. Diseases caused by smoking
Smoking can cause great harm to human health and even death. Chemicals and toxins entering the body during smoking can damage DNA and cause cancer. Smoking can damage the airway and lead to chronic obstructive pulmonary disease (copd). Smoking also causes inflammation in the lungs, causing permanent damage and reducing the ability of the lungs to exchange air effectively. Smoking can damage blood vessels around the body and make blood more likely to clot, leading to heart attacks, stroke and even sudden death. Chemicals in tobacco smoke interfere with fallopian tubes and increase the risk of adverse pregnancy, such as ectopic pregnancy, miscarriage and low birth weight. It may also affect sperm quality, reduce fertility and impair fetal development. Chemicals in tobacco smoke can cause inflammation and cell damage and weaken the immune system. Chemicals in tobacco smoke affect the body's regulation of blood sugar levels and exacerbate diabetes. To sum up, smoking is a serious, comprehensive and fatal hazard to human body.
Compared with mainstream tobacco smoke inhaled by active smokers, secondhand smoke has different concentrations of chemical constituents and chemicals. Some chemicals that are harmful to human health are much higher in secondhand smoke than in mainstream tobacco smoke. Secondhand smoke exposure can cause serious harm to human health, and there is sufficient evidence that secondhand smoke exposure can lead to lung cancer, tobacco odor aversion, nasal irritation and coronary heart disease. Secondhand smoke exposure is particularly harmful to the health of pregnant women and children. There is strong evidence that exposure to secondhand smoke in pregnant women can lead to sudden infant death syndrome and birth weight loss. In addition, there is evidence that exposure to secondhand smoke in pregnant women can also lead to premature birth, neural tube deformities in newborns and cleft lip and palate.
Plenty of evidence shows that smoking can cause lung cancer, oral and nasal malignant tumor in the pharynx, throat, esophageal cancer, gastric cancer, liver cancer, pancreatic cancer, kidney cancer, bladder cancer, cervical cancer, colorectal cancer, breast cancer and acute leukemia more organs such as malignant tumor.
Smoking can also lead to chronic obstructive pulmonary disease, asthma, pulmonary infection and other respiratory diseases, coronary heart disease, stroke, peripheral vascular diseases and other cardiovascular and cerebrovascular diseases.
There is strong evidence that women who smoke reduce their chances of conceiving, leading to placenta previa, placental abruption, fetal growth restriction, low birth weight and sudden infant death syndrome. There is also evidence that smoking can lead to erectile dysfunction, ectopic pregnancy and spontaneous abortion.
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