What are the white cigarettes? They are all spermicides.

In fact, cigarettes are all the same, because they contain too many harmful substances: harmful metal tobacco contains harmful metals such as arsenic, mercury, cadmium and nickel. Taking cadmium as an example, its harm is that △ cadmium can accumulate in the body, causing asthma and emphysema. △△△△△△ Trace cadmium will kill sperm in vas deferens and affect fertility. △ A large amount of cadmium enters the bone tissue, which makes the bone decalcified, deformed and brittle and prone to fracture. 1 cigarette contains cadmium 1-2 micrograms, of which 5% is absorbed by human body. The smoke released by tobacco combustion contains more than 3,800 known chemical substances, most of which are harmful to human body, including alkaloids such as carbon monoxide and nicotine, amines, nitriles, drunkenness, phenols, alkanes, aldehydes, nitrogen oxides, polycyclic aromatic hydrocarbons, heterocyclic compounds, hydroxyl compounds, heavy metal elements, organic pesticides and so on. They have a wide range, and they have various biological functions and do various harm to human body. Nicotine, also known as nicotine, is a colorless and transparent oily volatile liquid with irritating smoke smell. Nicotine is the main source of addiction. It takes only 7.5 seconds to inhale nicotine from cigarette smoke to reach the brain, which makes smokers feel a mild and pleasant feeling, which can make the central nervous system excited first and then inhibited. The half-life of nicotine in plasma is 30 minutes. When nicotine is below a stable level, smokers will feel fidgety, unwell, nausea and headache, and they are eager to smoke to supplement nicotine. △ 1 Nicotine in cigarettes can kill 1 mouse. △ Nicotine in 25 grams of cigarettes can poison a cow. △ 40-60 mg of pure nicotine can poison a person. The content of nicotine in cigarettes varies with the quality of tobacco leaves and processing technology. Generally, each cigarette contains 1.5-3 mg. When smoking, about 25% of nicotine is destroyed by burning, 5% remains in cigarette butts, 50% diffuses into the space, and only 20% of nicotine is really absorbed by the human body, so some people will not be poisoned if they smoke a box of cigarettes a day. However, the stimulation and damage of nicotine to many human organs are increasing day by day. △ Nicotine can cause stomach diseases such as stomach pain; △ Nicotine can cause high blood pressure, rapid heartbeat and even arrhythmia, and induce heart disease; △ Nicotine damages bronchial mucosa and causes tracheitis; △ Nicotine poisons brain cells and can cause central nervous system symptoms of smokers; △ Nicotine can promote the formation of cancer. Carbon monoxide is a colorless and odorless gas. People often say that gas poisoning means carbon monoxide poisoning. The affinity of carbon monoxide with hemoglobin is 250 times higher than that of oxygen. When people inhale more carbon monoxide, carbon monoxide and hemoglobin combine to form a large number of carbon hemoglobin, while oxygenated hemoglobin is greatly reduced, leading to hypoxia in tissues and organs, which in turn damages many organs such as brain and heart. Each cigarette can produce 20-30 mg of carbon monoxide when burning. If many smokers gather in crowded and unventilated rooms, the concentration of carbon monoxide in the air can reach 0.05%, which is close to the concentration of gas poisoning. The hemoglobin concentration of normal people who don't smoke is about 0.5%, while that of heavy smokers is as high as 15%-20%. That is to say, 15%-20% hemoglobin loses the function of transporting oxygen, leading to hypoxia. Smoke tar is a brown viscous resin, commonly known as "smoke oil". Smoke tar contains many carcinogens. Moreover, it will adhere to the surface of the trachea, bronchi and alveoli of smokers, causing physical and chemical stimulation and damaging the respiratory function of the human body. Benzopyrene Benzopyrene is a strong carcinogen, which still exists in coal, oil and natural gas, but can be diluted by the atmosphere, while benzopyrene in cigarettes is directly inhaled or diffused indoors by smokers, with a high concentration. When burning a pack of cigarettes, 0.24-0.28 micrograms of benzopyrene can be produced. According to the survey results, every time the content of benzopyrene in the air increases, the incidence of lung cancer will increase by 5%- 1μg/ 1 000m3. Radioactive substance Cigarette smoke contains two radioactive isotopes, 2 10 aluminum and 20 1 polonium, which can be absorbed into the lungs and deposited in the body when smoking. They emit radiation continuously for a long time, damaging lung tissue. A person who smokes 20 cigarettes a day inhales the radiation of radioactive elements in one year, which is equivalent to 300 X-ray chest films taken by smokers 1 year. Irritating compounds Tobacco smoke contains a variety of irritating compounds, including hydrogen cyanide, formaldehyde, acrolein and so on. For example, 1 filter-free cigarettes can produce 45 micrograms of acrolein and 100-400 micrograms of hydrogen cyanide, which destroys bronchial mucosa and weakens the function of alveolar macrophages, making the lungs and bronchi vulnerable to infection. 2. Poisons and Harms in Tobacco and Smoke According to scientists' determination, tobacco contains hundreds of complex chemical components, most of which are harmful to human body, among which 40 kinds of tar, nicotine, phenols, alcohols, acids and aldehydes are toxic and carcinogenic. After the cigarette is lit, the smoke produced contains all the chemical components in tobacco, and at the same time, it also adds some harmful substances to tobacco itself, such as carbon monoxide and cigarette tar. This is because in the process of making cigarettes, in addition to the tobacco itself, some substances such as cocoa, licorice, sugar, glycerol and ethylene glycol are added to the raw materials. Although these additives are harmless in themselves, they play a role in the combustion process.