LongWayAround
If I miss anything here, I'll apologize in advance. For some reason my phone is doing strange things with the "add quote".
As mentioned, tobacco was covered in my undergrad classes. Not just cigarettes. Federal legalities prevent long term studies on the carcinogenic effects of marijuana use and exposure, since most of those studies are federally funded or the labs that would perform the studies receive federal funding that would be eliminated if they took part in such a study. This is why you don't see warnings.
I've often wondered why there isn't a mainstream lab synthesizing the helpful compounds in mj in a regulated dosage in a pill form that would allow doctors to prescribe and treat without the carcinogens.
I'm not sure how many people would try to smoke a railroad tie, where I live, it wouldn't surprise me. In regard to mj in the pot shops, quite a lot of it is sold in dried, green, ready to smoke, form. At last count my middle America college town had more than 20 pot shops. The neighboring county had - at last count 160 grow operations. Who needs that much weed? We're in a fire prone area. Lol. My guess in that we're all going to smoke it at some point whether we want to or not.
I don't have a problem with people doing whatever they want as long as it doesn't affect the health, safety, or quality of life of someone else. If you want to blaze up in your own home- by all means, have at it.
I do think that people should make informed decisions when it comes to their health.