烟草是茄科一年生草本植物,又名菸草、相思草。性喜温暖,耐旱,适宜排水良好,有机质含量适中的土壤。原产美洲,我国华北、东北、西南各地栽培较多。叶极大,是制烟丝的原料。茎、叶均可提取烟碱、苹果酸、柠檬酸。茎和碎骨可制杀虫剂,对多种农田害虫、臭虫等都有杀灭作用。吸烟对人体健康有很大的危害,是呼吸道炎症、心血管疾病,癌肿的重要致病因素,吸烟又可污染环境, Tobacco is an annual herb of Solanaceae, also known as tobacco, Acacia grass. Warm, drought-tolerant, suitable for drainage, soil with moderate organic matter content. Native America, more cultivated in North China, Northeast, and Southwest China. The leaves are extremely large and they are the raw materials for making tobacco. Stems and leaves can be extracted from nicotine, malic acid, and citric acid. Stems and bone fragments can be used as insecticides to kill a variety of farmland pests and bed bugs. Smoking is harmful to human health. It is an important pathogenic factor of respiratory inflammation, cardiovascular disease, and cancer. Smoking can pollute the environment.