Different kind of smokes

…that it is more difficult to define the smell of a fire today than hundred years ago. Back then it smelled almost exclusively of burning wood and textiles. Today, odors from plastic and multiple other materials are added.

…the most analyzed odor is tobacco smoke which contains over 5.000 substances.

…in case of fires, odors stuck on all nearby surfaces, and the higher the concentration the more intense the odors stuck