This momentum will need to be reinforced not just by the UNFCCC, but also by other governance arrangements as explained in the next section. In this regard, the UNFCCC is one of many building blocks of a climate regime that consists of a range of international institutions and processes whose mandate affects climate action. While the UNFCCC has a central role in the climate regime, it interacts with many other intergovernmental and public-private institutions (Hjerpe and Nasiritousi 2015).