Now a days Cigarettes are very common al-over the world. In colleges, school, offices every-where it’s very common. People usually smoke cigarettes and don’t know what it’s contain. Cigarettes contain more than 4000 chemical compounds and at least 400 toxic substances. Most of people don’t know what happens when inhaling cigarette. When you inhale, a cigarette burns at 700°C at the tip and around 60°C in the core. This heat breaks down the tobacco to produce various toxins. Above the list, such things people don’t know but they do smoking and spending their life happily.