Official Trailer: Bong Joon Ho tackled Climate change and social hierarchy in Snowpiercer, an engaging movie where train compartments are used effectively to show the social divide while it speeds around the world impacted by global warming. By the time Bong Joon Ho made Snowpiercer, he was already famous, made his stamp with Memories of Murder, and The Host. With his latest work, Parasite, he has pushed himself a notch