In the movie, the "Rusties" were wiped out by a war, but the book reveals they were destroyed by a tiny organism that ate this specific fuel source.
What is oil/fossil fuels?
This is the name of the Sidebranch water feature Tally must follow; she has to be careful not to take the wrong turn at the fork.
What is a river
This is the name of the operation Tally is supposed to get that changes her bone structure, skin, and eyes.
What is the oporation
This is the name for the group of runaways and rebels living in the wild who have escaped the city's surgery to live "naturally."
Who is the smoke?
This heart-shaped object was supposed to keep everyone safe around Tally's neck, but when it was thrown into a fire, this all colapses.
What is a pendent/tracker?
The movie ends with a giant explosion at the city headquarters, while the book ends with Tally turning herself in at this location.
What is the hospital?
Tally calls these the "skeletons" of a dead comunity, where the metal is still strong
What is a Rusty Ruin
It’s not just a name; it’s a category for everyone between 12 and 16 who hasn't been "fixed" by a doctor yet.
What is an Ugly?
She is the rebel who taught Tally how to survive and left a coded note that only a "True Ugly" could understand.
Who is Shay?
Tally has been told that these fields of white are the best power source, but after joining the smoke finds out that they are actually poisonous to the land.
What are the Orcids?
They meet after seeing Peiris and leaving the pretty town. In the movie, she saves her life, whereas in the book, Tally thinks she is a guard.
Who is Shay
Tally's hoverboard only works if she is flying over a river or a path made of this specific material.
What is metal/iron?
These are people who have jobs like being a doctor or a warden; they aren't New Pretties anymore.
What are middle pretties?
She is the terrifying head of Special Circumstances who forces Tally to become a spy by threatening to keep her "Ugly" forever.
Who is Dr. Cable?
In the Smoke, they don't have Interface Rings, so they have to use these paper items to keep track of information.
What is a book?
In the movie, Tally’s friend is turned into a terrifying, Special almost immediately; in the book, he stays a happy, distracted New Pretty the whole time.
Who is Peris?
the only thing keeping them there is the fear of the vast, empty wilderness.
What is the city perimeter?
This is the Group that Tally is secretly working for because of the weapon the smoke has.
What is Special Circumstances?
These are the "Super-Pretties" who work for Dr. Cable; they have wolf-like features, fingernails like talons, and teeth filed into points.
Who are the Specials?
Tally spends a night sleeping in one of these "old-world" vehicles found in the ruins, which she finds disgusting and cramped.
What is a car?
Tally and Shay go here. In the book, Shay pranks Tally, but in the movie, they have fun here.
What is a roller coaster?
This is the slang term for the feeling Specials have—it’s the opposite of bubbly, where they feel sharp, cold, and dangerously focused.
What is being Icy?
This is the nickname for New Pretties because the brain lesions make them slow, happy, and unable to think about anything serious.
What is Bubbleheaded?
They are the two former surgeons who realized the city was "lobotomizing" its citizens and ran away to start a rebellion.
Who are Maddy and Az (davids parents)?
Because there are no machines to make things, Tally is horrified to see Smokies doing this primitive job to get leather for shoes.
What is skinning?