This is the world's smallest book on the world's biggest problem: CO2 and climate change. This book provides a concise and entertaining introduction to the most pressing environmental issue of our time. More than just a primer, even knowledgeable readers will learn something new and important about the science of climate change. The book is available for climate-outreach organizations at reduced cost and can be customized for your organization's needs. All proceeds from the book benefit the Citizens' Climate Lobby and climate outreach education.