When Clint Wilder and I wrote our first book, The Clean Tech Revolution, we knew we needed to travel to China if we wanted to understand the future of clean tech. Mind you, our trip took place more than five years ago, well before most people uttered the words "China" and "clean tech" in the same breath. But it was becoming increasingly clear, even then, why China was going to be such a force to reckon with. Today, most businesspeople, investors, politicians, entrepreneurs, and students understand the Chinese clean-tech juggernaut, what it might mean to the U.S., and why we need to prepare.