Zert Cage accepts a dare. The 13-year-old sneaks out of his house to engage in a Trash War with his friends. Nothing out of the ordinary about that. Except that it's 2083, and the world is falling apart. The Nuclear Mistake has left the oceans dead and brown, and grime and pollution are the way of life for anyone not wealthy enough to live in the Up Cities, which float high above the surface of the earth. Those left behind in the Low Cities wear...