Snowpiercer, directed by Bong Joon-Ho

 

I really liked this 2013 film based on a graphic novel. The film was directed by Bong Joon-Ho, who also directed Parasite. The premise is of a future where global warming has gotten so bad that scientists try to fix it by putting something in the atmosphere that will cool the earth, but it pushes the earth into an ice age. The only remaining humans are on a train that circumnavigates the globe once a year. Status on the train is reflected in what car you're in; the elite are near the front and poor people in the rear. There's now a TV series based on this as well. Thinking about getting the graphic novel...