• "There will be another billion people here by 2020," says Hot, Flat, and Crowded author Thomas L. Friedman. His ideas on how we should prepare:
START AN ENERGY REVOLUTION An "earth" race—like the space race—with China, India, Europe, to see which one of us can create clean power technologies first.
TEAMWORK ON FIGHTING GLOBAL WARMING The people in China tell me it's their turn [to pollute]. They say, "The U.S. ate the entrée and said, 'Let's split the bill.'" It's unfair, but they can either complain or help.
BIG IDEAS Incremental change—205 easy ways to go green—isn't enough. We need laws supporting a carbon tax and renewable energy. This is not a hobby; it's a revolution.