From Wired.com:

Fred Krupp is not your typical tree hugger. Chided by radicals for wooing corporate partners, the president of the Environmental Defense Fund is revered in Silicon Valley for championing a capitalist approach to clean energy. His new book, Earth: The Sequel (with Miriam Horn), spotlights the most promising climate solutions, from nanotech to flying windmills. Wired asked Krupp how these technologies can compete.