As the awareness of environmental problems increases, so too do the number of international rules and regulations to prevent them. To set up new rules, decision-makers need knowledge about the environmental issues addressed and therefore often consult experts.

This dissertation is a case study of the negotiations of an international agreement to mitigate dryland degradation, the 1994 United Nations Convention to Combat Desertification. It looks at how two non-state actors -- the scientific advisers on the International Panel of Experts on Desertification (IPED) and the non-governmental organizations (NGOs) -- exerted influence by providing knowledge to the state representatives who had the formal decision-making power in the negotiations. The two actor-groups' influence is assessed by establishing a number of influence indicators and by exploring a number of reasons for their signicant or insignificant levels of influence on the process and outcome of the desertification negotiations.

Desertification is an environmental issue with strong development connotations, and this study allows for an analysis of expertise and the role of non-state actors in international environmental negotiations in a North-South context. The study also provides a history of the international attempts at addressing desertification, as well as a description of the desertification negotiations in the 1990s.