Cigarette smoking involves inhaling smoke from burning tobacco wrapped in paper. The primary ingredient, nicotine, is a highly addictive substance that affects the brain and body. Smoking can lead to various health issues, including lung cancer, heart disease, and respiratory problems. Cigarettes contain numerous harmful chemicals, including tar and carbon monoxide, which can damage the lungs and cardiovascular system. Many countries have implemented regulations to reduce smoking rates, such as public smoking bans and graphic warning labels on cigarette packages. Quitting smoking can significantly improve health and reduce the risk of smoking-related diseases.