: Specialized workers (medical, security, food production).
: Oppressed stowaways ("Tailies") who live in squalor and are kept in check by brutal force. Snowpiercer - Expresso do Amanhã Ação, Drama, F...
: In an attempt to reverse global warming, nations released the coolant CW-7 , which accidentally triggered a new Ice Age, killing nearly all life on Earth. : Specialized workers (medical, security, food production)