The main components of tobacco

Tobacco contains nicotine, an alkaloid, which is neurotoxic, especially fatal to insects, but it can stimulate human nerves, and its tolerance will increase after long-term use, but it will also produce dependence. According to research, all the nicotine contained in three cigarettes or half a cigar can kill people, but the nicotine inhaled by smokers is only a small part of it. Tobacco can also be used to make pesticides and extract nicotine, malic acid and citric acid.

Modern research has confirmed that tobacco still contains some carcinogens, which has attracted more and more attention. In order to protect public health, smoking in public places has been banned in many places. The laws of many countries stipulate that the words "Smoking is harmful to health" must be printed on cigarette cases. According to the law of People's Republic of China (PRC), no media or public places are allowed to publish cigarette advertisements. Thailand stipulates that cigarette packs must be printed with a large number of pictures of the harm caused by smoking, such as the damaged teeth of smokers and the blackened lungs of smokers, so as to warn smokers and achieve the effect of quitting smoking. Bhutan banned all tobacco imports and became the first smoke-free country.