This is what popped up, first thing on google:
"decomposition brought about by high temperatures."
When you see smoke or "vapour" coming off a piece of wood, even if it's not technically burning yet - that's pyrolysis. Wood doesn't burn, the gasses do (from pyrolysis).
I think everyone is overthinking this all.... again, if it looks like smoke, tastes like smoke, it's probably smoke. It's really not a big caramilk type of secret. No need to head to the lab... it is what it is, and some people love it, but most here on FC that have been around a while and seek herbal VAPORIZERS that are regulated to PREVENT what's going on with the Switch won't.
Then again, according to the polls, about 10% of FC STILL COMBUSTS!