This publication by the Inter American Development Bank discusses the unique role that National Development Banks could play in scaling up private financing for climate change mitigation projects through the intermediation of international and national public climate finance in their respective local credit markets and the conditions that would be needed for them to be most effective. It draws from experiences in international climate finance and best practices, processes, and products of NDBs within the Latin American and Caribbean region. Overcoming barriers to private sector investments is critical, and international climate finance can play a critical role in this regard.