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... a known or probable cause of some 25 diseases." - This text is taken from BBC News online, on reading this i instantly became interested in the facts and figures of smoking and health. Cigarettes contain more than 4000 chemical compounds and more than 400 toxic substances. When you inhale, a cigarette burns at 700 degrees C at the tip and around 60 degrees C in the core. This heat breaks down the tobacco to produce various toxins. As a cigarette burns, the residues are concentrated towards the butt. The products that are most damaging are: tar, a carcinogen (substance that causes cancer). nicotine is addictive and increases cholesterol levels in your body. carbon monoxide reduces oxygen in the body. components of the gas and particulate phases cause chronic obstructive pulmonary disorder (COPD). Research has shown that smoking reduces life expectancy by seven to eight years. Did you know? On average, each cigarette shortens a ...