Earlier quoted context omitted.
> having smoke in your lungs is having smoke in your lungs whether it comes form a cigarette or a joint This is not a thing that's true, it's a thing you assume. Having different smokes or vapors in your lungs can have different effects, just as drinking different liquids can have different effects. Tobacco smoke causes cancers. The more elements in another smoke that are shared with tobacco (or other plants that cau…
From what I have read any type of smoke you put in your lungs is carcinogenic, Marijuana included. https://www.ncbi.nlm.nih.gov/pubmed/23846283?dopt=Abstract
It's like they want it both ways.