That's true as a student I know "cigarette smoking is dangerous to your health" . And in this world there are many smokers we know. They do not aware that cigarette smoking can get multiple types of cancer, asma, tuberculosis, emphysema, heart diseases, and other disease affecting the lungs. In smoking ones you started it's hard to stop because smoking tobacco contains nicotine which is highly addictive. So I remind to all smokers you must quit that habit if you want your life stay longer and healthy.