Explains solar, wind, hydro, wave, geothermal and other technologies, and how to break the barriers to a 100 percent renewable world.

Few people doubt the threat of climate change and the urgent need to conquer fossil fuel addiction. But can renewable sources of energy ever be sufficient to provide modern societies with a decent quality of life? This book is clear they can, covering all the latest technologies and a road map to powering the world, not just sustainably, but democratically.