Clustering of Multilateral Environmental Agreements: Potentials and Limitations

The concept of clustering of multilateral environmental agreements (MEAs), i.e. the integration of groups of MEAs or parts thereof, has acquired prominence in recent discussions about reforming international environmental governance. Understood as a continuing process, clustering of MEAs aims at advancing the ongoing process of integrating the elements of this system more systematically and dynamically. This paper proceeds in three steps. First, it demonstrates that a distinction needs to be made between clustering of organisational elements of MEAs and their functions, since the conditions and the effects of their integration differ significantly. Second, it argues that – in contrast to several existing approaches that seek to build clusters starting from similarities in one dimension – any attempt to integrate elements of MEAs needs to be based upon the analysis of a range of factors that influence the prospects of such integration (including overlap of membership and issues, practical feasibility, legal obstacles, and functional requirements). Third, the article contrasts the main potential benefits of a clustering of MEAs, namely efficiency gains and an increase in the coherence of international environmental governance, with the main challenges of international environmental policy, namely reaching agreement, implementing such agreement effectively and preventing/managing inter-institutional conflict. While clustering cannot be expected to make a significant direct contribution to addressing these challenges, it has a potential to economise and enhance the system of international environmental governance with positive indirect effects promoting better international environmental protection in the longer term.