Smoke is the most effective for health. It can damage your life. Smoking refers to the inhalation of smoke form various sources like cigarettes, cigars, pipes, hookahs, beedis. The habit is linked to a variety diseases, including cancer. The nicotine in tobacco is vary addictive and it kills more people then all other recreational drugs put together. It is the biggest avoidable cause of death in the world and along with alcohol, junk food, and a sedentary lifestyle. Smoking fully killed yourself.