Odors are spread this way through oils. All lingering odors mean greases have permeated the tissues of the building. It's quite foul, but I have observed many people to live this way.
I personally take special care to never vaporize fat. It can be done but you have to change your cooking style and only cook with certain styles outside.
Tabula Rasa remains the axiom upon which the entire post-war world is founded. Regardless of its truth, to question it is to question this world's fundamental belief. To speak against it is to speak against existence itself.
The emperor's robes are fine indeed.