This Research Handbook examines one of the most dynamic areas of public international law: the interaction between environmental law and policy and international investment law. The multiplicity of forms that interaction takes is the core theme of this Research Handbook. The contributors are drawn from a variety of legal backgrounds to give a well-rounded view of this complex relationship.Taking a thematic approach, this Research Handbook provides analysis on key issues in the environment-investment nexus, including freshwater resources, climate, biodiversity and sustainable development. The expert contributors unpack the complexities of this field of research through investigating regional experiences, assessing practices and procedures, and offering innovative approaches and new critical perspectives on the issues involved. The Research Handbook demonstrates that the exact nature of the relationship between environmental law and investment law is still evolving and, in so doing, indicates directions for future research. This timely Research Handbook will be of great interest to scholars who are researching the interactions between environmental law, international investment law and sustainable development. More widely, those with a research interest in public international law will find this to be a compelling reference tool.Contributors include: R.J. Anderson, F. Baetens, A.K. Bjorklund, G. Bottini, C. Brown, D. Cucinotta, M. Ferrer, S. Frank, U. Kriebaum, J. Levine, D. Liang, E. Luke, S. Luttrell, E. Méndez Bräutigam, K. Miles, I. Odumosu-Ayanu, N. Peart, J. Peel, B.J. Richardson, A. Telesetsky, K. Tienhaara, V. Vadi, J.E. Viñuales, R. Weeramantry, R. Yotova