Finally. Although edibles are safer.
edit: I didn't realize you were pointing out the effect of smoking cannabis.
And yes, you can get lung/throat cancer from inhaling pot smoke. Probably way worse than from a cigarette because there's no filter (THC is super sticky, so it's kind of counter productive).
"Although marijuana smoke contains a number of carcinogens and cocarcinogens, findings from a limited number of well-designed epidemiological studies do not suggest an increased risk for the development of either lung or upper airway cancer from light or moderate use, although evidence is mixed concerning possible carcinogenic risks of heavy, long-term use." -- http://www.ncbi.nlm.nih.gov/pubmed/23802821
It is not I who is avoiding rationality, friend. Check your ability to corroborate your statements with evidence.
You're also choosing to ignore the studies that show moderate use (e.g. people who smoke it casually and aren't huffing 24/7) show no increase in cancer.
Maybe if you smoke from the moment you wake until you pass out you might have an increase of cancer. Same way that drinking water til you die of water poisoning is a thing. It is freakishly uncommon and you'd have to more or less choose to do so on purpose.
That seems hardly conclusive.
This is, of course, shitty compared to actually providing a study.
The same held true for tobacco for quite a long time, do keep in mind.
[1] http://www.mayoclinic.org/healthy-lifestyle/quit-smoking/in-...
[2] http://www.cancer.org/cancer/cancercauses/tobaccocancer/smok...
The likely carcinogens in question: https://en.wikipedia.org/wiki/Tobacco-specific_nitrosamines
In fact, there are also problems for smkers who cough up and then swallow phlegm - this increases risk of bladder and penile cancers.
Let me be hyperpedantic: https://en.wikipedia.org/wiki/List_of_poisonous_plants
There are plenty of plants that can hurt your stomach a great deal. Some will even kill you.
"It's a plant" is not an argument.
I imagine our government is either more conservative with making such announcements (more conservative than UK though?) or tobacco companies are lobbying to delay the release of such announcements until such time as they can re-tool and switch business models. I know RJ Reynolds is already making a heavy play for vaping and slowly switching over their business to make it their main thing.