This project examines the causes and consequences of, and responses to institutional complexity for the issue areas of geoengineering, REDD+ and short-lived climate pollutants. These areas are chosen for their common importance, but varying levels of institutional complexity and different problem structures.

First, the project maps institutional diversity in these areas, drawing on methods such as legal and network analyses. Second, the project offers a theory-driven analysis of the causes of complexity, drawing on theories from international relations and law. Third, the project analyses the consequences of complexity, using interviews and extensive literature reviews.

From these analyses the project derives recommendations for public and private stakeholders on navigating institutional complexity in the three areas. The project is significant from a policy-making perspective in that: it deals with three issues with high levels of policy attention; it helps different types of stakeholders deal with institutional complexity in global climate governance; and it highlights the interconnectedness between the UNFCCC and other institutions, showing how they can support each other and thereby enhance the ambition of climate policy.