This book provides a critical study of environmental regulation and its enforcement in New Zealand, situated within green criminology. It seeks to address the question of whether the offences in the Resource Management Act 1991 are working, by drawing on a range of sources including: central government data, local government policies and reports on enforcement, information requests of councils, studies of local authority enforcement behaviour and case law to. Through highly layered and richly textured analysis, the project exposes the problems that can arise when an expansive approach is taken to offences, penalties and institutional arrangements in an environmental regulatory statute. It emphasizes how discussions of harm and what should be unlawful will ensure that law-makers enforcement tools will align with their goals for punishment. It examines higher-level issues such as ‘wrongfulness’ and ‘criminality’ in the environmental regulatory context and explores the relevance of its findings to jurisdictions outside of New Zealand. It also discusses the pros and cons of criminalisation and punishment versus restoration. It speaks to those interested in green criminology, regulatory compliance and enforcement, and applications of criminal law.