Other mistake: As Viggo Mortensen narrates, it's been years since every crop and animal has died. Trees have been dead so long they're rotting where they stand and falling over with a stiff wind or slight tremor. Yet, in the woods, there are always fallen leaves on the ground which ought to have long ago decomposed, rain or no rain. Obviously, they can't sweep out the whole forest to make a movie.
The Road (2009)
1 other mistake
Directed by: John Hillcoat
Starring: Robert Duvall, Charlize Theron, Guy Pearce, Viggo Mortensen, Kodi Smit-McPhee
Plot hole: Despite supposedly being deprived of food, neither of the main characters (nor most of the minor characters) seem to display any signs of malnutrition. They both have all of their visible teeth, their stomachs are not distended and they seem to have a large amount of energy to travel by foot over lengthy distances.
The Man: I told the boy when you dream about bad things happening, it means you're still fighting and you're still alive. It's when you start to dream about good things that you should start to worry.