This introductory chapter argues that sport can be an effective setting to study environmental justice and its related concepts. The chapter begins with a broad overview of environmental justice, both as a social movement and a subject of scholarly inquiry. Next, parallels are drawn with sport stadiums, particularly by emphasizing the cyclical relationship between sport and the environment and exploring how similar themes have emerged in the political challenges encountered by environmental justice activists and opponents of major stadium developments. The chapter concludes with a preview of the book, the contents of which are organized into two parts. Part I contains an overview of key environmental justice issues, and Part II includes a collection of case studies from which some common threads can be found.