Many environmental law scholars perceive environmental law scholarship as immature. We discuss why this self-perception has arisen and argue that a common theme is methodology. We argue that the subject can only mature when we face its methodological challenges head on, and we identify four particular issues that have given rise to these challenges: the speed and scale of legal/regulatory change, the interdisciplinary nature of the subject, the heavy reliance in environmental law on a diverse range of governance arrangements and the multi-jurisdictional nature of the subject. We argue that there is a need for debate in the face of these challenges and identify some starting points for that debate. © The Author [2009]. Published by Oxford Un...