You know these labels on cigarettes that state the smoke contains at least 253 toxic chemicals? The smoke from other plants of course contains at least about 200 of the same chemicals.
People think the formaldehyde and all these other chemicals with spooky names were added by the bad cigarette companies..but not so!! Whenever any hydrocarbon is burned, a characteristic distribution of alkanes, alkenes, and alkynes is formed -- with the nastiest and most "radical" chemicals (like the alkynes), appearing with the lowest frequency.
That's why smoking has almost no risk unless repeated. With enough exposure, those minimal alkynes add up. And they destroy DNA and wreak general havok due to their bond energy.
I know I just reiterated your point. Thank you for making the point - smoke is what is a probabilistic distribution of energetic hydrocarbons -- not the plant!!
That's one of the things that amuses me about these new studies coming out showing smoking marijuana is healthier than nicotine. Yeah that may be so, but that doesn't mean you have to smoke it over like putting it in a tea or something