The last three years have seen acceleration in the development of cleaner energy systems. This book defines clean energy and presents applications for high efficiency with rapid start-up and loading, minimum emissions, and simpler technology with less material and energy used in its construction. The author, who has more than forty years of experience as an international journalist reporting on power-generation technologies and energy policies around the world, argues that there is no place for coal; rather, combined cycle, hydro, solar and biomass must complement nuclear energy, which must serve more applications than just generating electricity.