This course provides an introduction to the essential conceptual and technical aspects of constructing greenhouse gas emissions inventories, with a focus on methane. Participants will explore various strategies for building inventories, understanding their advantages and limitations. Key topics include the structure of emissions inventories and the integration of methane measurement data. The course will also cover regulatory and voluntary approaches to reconciling data and generating methane inventories, providing practical examples to illustrate these concepts. Participants will develop an understanding of the tools and methodologies used in inventory development and the complexities involved in their creation and management.