I used to smoke and I am so glad I quit.  Do you know how bad smoking is for you health wise?
Yes I do overall smoking has nothing but negative consequences
Do you know anything specifically I should be worried about regarding smoking 
Its bad for you smoking challenges the respiration process which is vital to live
I have heard of something called COPD and how that is related to smoking.  Do you know anything about that?
No but I know in some cultures various rituals include smoking
I have heard of that.  I know of the peace pipe.  Is that what you are referring to?
Yes and in other cultures smoking is used to go into a trance or gain enlightenment