It's not crazy, or that hard to imagine. Modern people don't deal with fire much, but our ancestors were always surrounded by fire and smoke. In fact, as a smok

It's not crazy, or that hard to imagine. Modern people don't deal with fire much, but our ancestors were always surrounded by fire and smoke. In fact, as a smoker (natural leaves only), I feel my lungs take it pretty well, contrary to popular belief. I believe our ancestors adapted to smoke, and eventually burnt enough things to know which plants did what. It's sad in modern times we're completely disconnected from nature and substances that can only be toxic precisely because of this disconnect.