A few nights ago I saw a movie called The Road. The Road is a post-apocalyptic story about a man (Viggo Mortensen) and his son (Kodi Smit-McPhee) traveling south to reach the coast. There really isn't much more to the plot than that. It's really just a basic story of survival. Survival from starvation, the elements around them, and worst of all-- cannibals. Yep. It appears in whatever disaster that took place, there's no food really left in the world. Not any fresh food anyways. So there are many cannibals within this story.
While not being the most engaging movie, The Road is an interesting tale of how the world may be if some untold disaster did in fact destroy all vegetation and stuff on earth. Go and see it.