Smoking doesn't reduce lung capacity, it does increase the dead space as it reduces the surface area available for the exchange of gases.
the tar builds up inside your lungs and you take in less oxyogen :) you eventuly die ! or live a short life
After 3 years of continuous smoking you increase your chances by 99.9% of getting lung cancer. Smoking will not only kill you it can kill your loved ones too. The secondhand smoke can be inhaled by...
Coal tar.