This edited book is centred around the novel didactic model of Transformative Language Teaching for Sustainability. The contributing authors discuss the uses and possibilities of the model, as well as other sustainability-related aspects of language education, such as Education for Sustainable Development, transformative language teaching methods, and ecolinguistics. The book consists of a combination of theoretical review articles and practical research articles drawing on findings from a variety of contexts and educational settings. While there are many practical examples of pedagogical approaches and methods for transformative education for sustainability, this book presents a thorough framework based on academic research, designed to be useful to language teachers, teacher trainers, policy makers, and curriculum designers, as well as academics working in fields such as applied linguistics, language learning, language teaching, language education policy, environmental education, and sustainability education.