Over at Seven Revolutions they are trying to outmaneuver the apocalypse. Actually, they are looking into the seven most daunting problems and challenging revolutions in store for us in the near future. Do you get the knee-jerk reaction to overpopulation that I do? Well, maybe we're right. I live in Las Vegas, an ostentatious and artificial oasis in the desert. Did you know that about half the world's population lacks access to clean drinking water? Can you guess the other five before the page opens?