The transition to carbon-free energy won’t depend primarily - or even mostly - on energy experts. Of course, we need highly educated technologists and planners to get there. But it’s people – lots of people! - from all walks of life, across every stratum of our society, who will make the billions of decisions that all together will produce our clean energy future. It is for them that Charles Eley, drawing from his decades of leadership on energy efficiency and sustainable buildings, has created this volume.