This chapter is not designed to provide a comprehensive overview of research methodologies and methods (readers can refer to general social-science texts for this purpose). Rather our intention is to concentrate on several key areas that are important for green criminologists to consider as they undertake research on environmentally related topics of their choice. As such, this chapter considers the different ways in which green criminology has been – or might be – conducted. It asks critical questions about current approaches, including when and where study should take place, how research might be undertaken, with whose participation, and in whose interests. Answering such questions requires an examination of existing conceptual and theoretical approaches to the practice of green criminology, with a view to identifying the complexities of researching transnational environmental harms and crimes. By understanding the challenges of working in this area, we also hope to identify directions for future methodological development.