1. Professor of Environmental Law, Faculty of Law and Corpus Christi College, University of Oxford, . This article was completed with support from Leverhulme Grant MRF-2021-071. I would like to thank Mark Aronson, Sonam Gordhan, Christopher McCorkindale, Brian Preston, Eloise Scotford, and Neil Walker for comments on an earlier draft of this article. Any errors or omissions are my own. I acknowledge the support from Leverhulme Grant MRF-2021-071.