A super storm envelops the globe, sending tornadoes skittering through Los Angeles, pounding Tokyo with hail the size of grapefruit and burying New Delhi in snow. Brace yourself. After decades spent tackling volcanoes, aliens, earthquakes, asteroids and every other disaster imaginable, Hollywood has turned its attention to one of the hottest scientific and political issues of the day: climate change. No one is pretending the forthcoming film "The Day After Tomorrow" is anything but implausible: In the $125 million movie, global warming triggers a cascade of events that practically flash freeze the planet. It's an abruptness no one believes possible,...