Okay sport. If you want to believe that regular use of marijuana IMPROVES lung function and increases lung capacity IN SPITE of the myriad of studies AND common sense that says otherwise you go right ahead. But of course that's not your goal. Your goal is to keep promoting pot usage and contributing to the downfall of western civilization.
“the myriad of studies AND common sense that says otherwise”
Post links to a few of those “myriad of studies”. Remember: YOUR claim, YOUR homework.