The above link will take you to a short movie that is very informative about COPD and Emphysema and the treatments available. It also shows a smoker's lung before quitting and after quitting. Awesome photos!
You will learn the different inhalers and steroids as well as hear a little bit about 02 therapy. The doctor covers a lot in a short time.
I hope this short video helps you. It is awakening for those who have not yet seen the difference in the lung prior to and after quitting.