Tobacco is a plant that contains nicotine, a highly addictive chemical. It is consumed through smoking cigarettes, cigars, beedis, or hookahs, as well as through chewing products like gutkha and paan masala. While many start using tobacco to look "cool" in their teens, it can lead to serious diseases like cancer, heart disease, and lung disease. The document outlines the various methods of tobacco consumption and their health effects, such as the high risk of mouth, lung, and other cancers. It also discusses the need for greater public awareness campaigns on the dangers of tobacco.