All relative of course, but yet to see the science of people dying from long term marijuana smoke. Or any serious side effects for that matter, while it may be inhaling harmful toxins I don't see it as risky behaviour. As we inhale harmful things daily. Most things are "bad" for you in some way.
Man I don't mean to pick on your personally, I enjoy our interactions here and have nothing but good will towards you
However, and this is a common issue; I see a lot of people saying things recently such as 'I am yet to see the science on x'.
Now the question here is do you even actually read scientific journals? Most people do not, ever! Do you pay the up to $30 per article to be allowed to even access this literature if you yourself aren't a scientist or college student?
If not, then of course, you haven't seen any science on your given topic. This is because you haven't been looking though, rather than because there is no literature there!
Again, I don't mean to pick on you brother, it is not that I expect everyone will read the scholarly literature - but please don't make appeals to it if you aren't familiar with it and can't cite specific articles. Avoid arguments from absence of data on a given topic, which only allow for a conclusive 'I don't know' argument.
The problem with all of the appeals to scientific literature being thrown about is that it creates a boy who cried wolf effect, where people start thinking science is not credible because someone said something false and claimed scientific research backs it up. This hurts the credibility of science more broadly in the community.
Thermal degradation byproducts of cellulose and other compounds in cannabis are unsafe to inhale. We know this from research into smouldering combustion of wood and various other plant fibres. There is evidence to suggest that there are other active compounds in cannabis that will counteract some of the carcinogenic effects of these degradation/oxidation byproducts. It is not yet clear the extent to which the risk is both created by degradation byproducts and mitigated by the active compounds. We should not reach simple conclusions about this complex question yet, the data isn't there.
It is unclear and very difficult to get reliable data on the harms of cannabis smoking in people, since we are often relying on self-report from research subjects and asking people to tell us about shit that will incriminate them and that they might be inclined to misrepresent. People routinely lie to researchers about cannabis use, especially in the US (where most of the research has been done - also remember research outside of the US may have confounding factors like the mixing of tobacco with cannabis) where you may lose your medical cover if your insurer knows you use it. They also routinely just tell researchers what they think the researchers want to hear, this phenomenon is well known and studied in the psychological literature.
I am not saying combusting cannabis will necessarily kill you, it might not in many or even most cases - but if scientists don't yet have the whole picture, we should not overstate our argument by using the absence of evidence (or the absence of your having yet read the evidence) to argue that something is NOT dangerous when actually on the evidence we have, we can reasonably infer that it is likely to be dangerous to some extent.
I take nothing away from your broader point that it is for each person to decide which risks they are comfortable taking, but remember also that the cumulative effects of inhaling harmful things (especially directly without much accompanying oxygen!) are also a consideration. You can over time inhale enough nasty shit to cause problems in the longer term. This means that the 'we inhale harmful things daily' argument doesn't hold water. Yes, we do inhale harmful things in our day to day lives. Yes we should minimize this as much as possible to stop any accumulating damage from the build up of too many harmful things inhaled into our systems over time.
Still, my main and overriding forget-everything-else-I-said-here point is as a scientist, I beseech you all: Can we please not make appeals to science that we haven't read?
Again, I do not mean to pick on you here Tommy, this is a widespread thing that happens around these parts, I only said anything now though lol
Also I'm not saying we should provide a reference list with every post lol - just that we would benefit from being more transparent in how we express ourselves (without compromising one's personal privacy/security obviously!) and actually being sure that we have read this in a credible scientific publication (ie: something that you would find on
www.scholar.google.com or other scholarly databases from peer reviewed articles rather than just a normal google search, which could bring up any grade A bullshit). If you can cite the source you read from memory in the post, that is just gravy!
Otherwise, let's just avoid appealing to science if we aren't actually familiar with it. No shame in that either
Sorry if this seems like a hobby horse guys, but as a scientist myself, I can say that this is a very real issue in many scientific disciplines right now.