Every time I fly, I always feel uncomfortable, accompanied by tinnitus or even slight dizziness, and extremely insecure, especially at the moment of taking off, there is always a sense of being out of touch with reality.

And I always have a question: Where does the sewage from the aircraft toilet go? Will it be difficult to bring it back to the destination? It's too much trouble, and I've never heard of the crew dealing with it after landing. Later, I learned from a book that the fog was diluted in situ and then drifted directly in the air.

That is to say, based on inertia and free-fall calculations, whenever...