Exactly for this reason, all it would have taken was to throw out a torch, and those spores floating in the air would instantly have been engulfed by the flames.
However, although this method was efficient, it was not foolproof. After all, at that time, Zachary was in the midst of the forest. Although igniting the floating spores in the air was quite simple,
nobody could be sure that once those spores were lit, whether the fire would spread rapidly and eventually become a Natural Disaster that human effort couldn't stop.
Confronted with the possibility of this kind of Natural Disaster, even if the likelihood was not very high, Zachary still didn't want to gamble on the odds.