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Lungs Of Non Smoker And Smoker

The left one is non smoker lungs and right one is smoker lungs. The black colour is due to the presence of tar, which is contained in cigarette smoke.

Smoking is an addictive drug. Smokers get addicted to the ingredient nicotine that has a stimulating as well as a calming effect on the brain. Due to this most of the smokers get if difficult to quit smoking. In every 9 seconds one person dies as a consequence of cigarette smoking