Say shows the lungs of a smoker after 30 cigarette packs, i.e. a pack a day for one month; Our Chris Notap gives the answer by doing an experiment.

Employing cotton balls disposed in a vacuum container with a hole. The tobacco is evenly sucked by each cigarette and through the cotton balls. The brown tar gradually accumulates around and inside and the pumping pipes.

After this, it is easy to imagine the consequences of tobacco on the body of a smoker.