Why produce a book on teaching environmental law? There are three principal reasons that we offer. First, environmental law has emerged since the 1970s as a widely embraced component of the undergraduate law curriculum in many countries. It is also a specific focus within numerous postgraduate legal studies and research programs. Whether it has become a part of the mainstream of legal education or remains a marginal component is open to debate, and the answer may vary from one country to another. We examine this matter further below, but, irrespective of the conclusion, this development in itself justifies a specific examination of the teaching of environmental law. We believe that this book is the first to be devoted entirely to the subject of teaching environmental law and hope that it will provide both inspiration and practical guidance to legal scholars who are seeking to take up, or improve, their teaching of this subject. We also hope that it will encourage further discussion and debate amongst environmental law scholars about how best to do so.