The role of the G20 in governing the climate change regime

A wide array of institutions governing climate change has proliferated over the past years, influencing the rule-makings of the regime. One of them is the G20. When G20 leaders around the world convened in London to restore global economies, they stressed the importance of a ‘resilient, sustainable, and green recovery’ and reaffirmed their commitments to address climate change. This was followed by their agreement on phasing out inefficient fossil fuel energy subsidies over the medium term in Pittsburgh. The ‘coexistence of narrow regimes in the same issue-area’ could be described as ‘regime complexes’, which enable countries to adapt more readily, particularly when adaptation requires complex changes in norms and behavior. Given that responses to climate change would require changes in the domestic politics of different countries at different levels, loosely integrated institutions of regime complexes could be more advantageous for countries to adapt and in engaging with developing countries. This paper demonstrates that the G20’s highly informal institutional setup as well as its flexible cooperation tools could enable its members to customize their policies and better engage with third-party countries. In addition, the G20 group could collectively influence other key countries to reach an agreement on some of the key climate change–related issues, thereby facilitating the United Nations process of climate change.