text: ok i dont know how well this is going to help you but, here are some really good web sites you can check out 1.wikipedia.org  2.greenfacts.org  3.quit4good.com/facts.html  4.tiger.towson.edu/users/rvazq1/smoking.html   5.quitsmoking.about.com/od/photogallery ( this one has different links that you can click on for different things such as/ cancer, copd, etc)  6.quitsmokingsupport.com/lungphotos.htm  ( this one has really good pictures and e-rays ).now that i have covered some web sites i would like to tell you a little of my story as it applies to your research, i am 50 yrs old still pretty young, but because i smoked for over 30 yrs, i now have copd, and must be on oxygen and do treatments 4 times a day, plus take medicine and use 4 different inhalers everyday for the rest of my life and even though i quit smoking 2 yrs ago, the damage has still been done and now i can barely walk from my living room to my bedroom without breating hard and having to stop and catch my breath, and i have a 5 yr old grandson who i adore but, i can not play with him, because it would probably kill me, and he is already asking questions about why i cant and its hard to give him good answers, but i do my best to be upfront and honest with him.i hope all this information will be of help to you and please for gods sake , dont be a smoker!! god bless you and if i can be of further help my email is---chila1113@yahoo.com. good luck to you.sm