"Every conurb, my guide answered, has a chemical toilet where the city's unwanted human waste disintegrates quietly, but not quite invisibly. It motivates the downstrata: "Work, spend, work," say slums like Huamdonggil, "or you, too, will end your life here." Moreover, entrepreneurs take advantage of the legal vaccuum to erect ghoulish pleasurezones for upstrata bored with more respectable quarters." - Sonmi-451 in Cloud Atlas by David Mitchell