Plot: This movie takes a big-budget, special-effects-filled look at what the world would look like if the greenhouse effect and global warming continued at such levels that they resulted in worldwide catastrophe and disaster, including multiple hurricanes, tornadoes, tidal waves, floods and the beginning of the next Ice Age. At the center of the story is a paleoclimatologist (a scientist who studies the ways weather patterns changed in the past), Professor Jack Hall (Quaid), who tries to save the world from the effects of global warming while also trying to get to his son, Sam (Gyllenhaal), who was in New York City as part of a scholastic competition, when the city was overwhelmed by the chilling beginnings of the new Ice Age. In addition to all of the other challenges Dr. Hall faces, he's also going against the flow as humanity races south to warmer climes, and he's nearly the only one going north...