Non-smoker lungs vs Smoker lungs (black).

 If you haven't quit yet there's still time! If you don't want to end up like the lungs below consider this alternative or any other but please quit. This is NOT an Ad for anything. Simply a wake up call. These are real lungs. 
Here's an action plan to quit smoking http://www.mayoclinic.com/health/quit-smoking/MY00433