Why, despite all we know about the causes and harms of global heating, has so little effective action been taken to cut greenhouse gas emissions, and what we can do to change that? This book explains the mechanisms and impacts of the climate crisis, traces the history and reasons behind the lack of serious effort to combat it, describes some people's ongoing scepticism and how to shift it, and motivates an urgent program of action. It argues that the pathway to stopping dangerous global heating will require a much larger mobilization of advocacy and activism to impel decision makers to abandon fossil fuels, and transition to renewable energy and electrification embedded in a political and social framework guided by justice principles. It is an excellent resource for students and researchers on the climate crisis, the need for a renewable energy transition, and the current blocks to progress.