This is especially important since Edward won't find much ammunition for the pistols, shotguns and other weapons in the game. Instead he needs to be creative and use the items he finds or the environment for his advantage. Especially since most enemies can only be permanently killed by burning them, igniting a wooden chair at a nearby fire, or using a lighter and a can of hairspray are Edward's best bets to knock them out.
Fire plays an important role in the game at all times. If not extinguished, it will slowly burn through anything in the vicinity and spread until everything burnable has been reduced to a smoking pile of ash. This behavior can of course be useful to Edward if he for instance wants to get through a closed wooden door and has nothing heavy at hand to force his way.