Campfires are smaller. A factory that just burned wood for no reason would have nasty ass emissions, so scale comes into play there. But yeah, there are like...super toxic fires and sorta toxic fires, there are no nom toxic fires.
Didn't know about the hookah thing, why is thst worse? I have heard stoners over extol the virtue of water filtration via bong cause theyre stoners and are dumb.
The other major aspect to consider when choosing between cigarettes and smoking other stuff is that cigarettes are a drug and herbal cigarettes arent. So if you're smoking herbal cigarettes you're just breathing smoke cause you like the smell. You're still doing the majority of the harm and not getting any of the fun.