The new edition of this market leading textbook offers the most current overview of international environmental law. Written for students it provides a fresh understanding of international environmental law as a whole, seen in the light of climate change, biodiversity loss, and the other serious environmental challenges facing the world. The new edition retains the manageable size of the first, with careful selection of topics and the adoption of a cross-cutting synthesis of regulatory interaction in the field. It also places international environmental law in the broader context of public international law in general, revealing at the same time that international environmental law is experimental ground for developing new legal approaches towards global governance. Combining theory and practice, clarity and comprehension, the authors have written a textbook which should be required reading for all students of the subject.