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This report, commissioned by the G20 Sustainable Finance Working Group under the 2025 South African G20 Presidency, examines how Vertical Climate and Environmental Funds (VCEFs), Multilateral Development Banks (MDBs), and National Development Banks (NDBs) can collaborate to scale climate finance. It identifies financial and non-financial barriers to cooperation and proposes a roadmap of short- and mid-term actions to improve interoperability, leverage local currency financing, and mobilize private capital to meet sustainable development and climate goals.

The report provides an overview of global climate finance trends between 2018 and 2022, highlighting a total reach of USD 1.46 trillion in 2022 and noting significant disparities in growth between advanced economies and emerging markets and developing economies (EMDEs).

This report by Climate Policy Initiative and E3G analyzes the financial interactions and Paris Agreement alignment of Multilateral Development Banks (MDBs) and National Development Banks (NDBs) in emerging markets and developing economies (EMDEs). It identifies a lack of comprehensive documentation on climate finance flows between these institutions and highlights significant divergence in how MDBs and NDBs mainstream climate considerations into their operations. The report provides recommendations to optimize operating models, clarify institutional mandates, and share technical expertise to scale up climate-related on-lending.

This World Resources Institute working paper analyzes four scenarios to determine how developed countries can meet the 2009 Copenhagen commitment to mobilize $100 billion annually by 2020 for climate action in developing countries. The analysis projects that reaching the target will likely require a combination of public finance sources and leveraged private sector investment, while noting a persistent imbalance where mitigation finance far outweighs adaptation finance.

This discussion brief by the Stockholm Environment Institute reviews global studies to estimate the international finance required for climate change mitigation, specifically for a warming trajectory of no more than 2°C. It distinguishes between various metrics—such as total, incremental, and net climate-relevant investment—and highlights a significant gap between current funding and the needs of developing (non-OECD) countries.

This research paper evaluates the sustainable development benefits of 77 Clean Development Mechanism (CDM) bioenergy projects across India, Brazil, and sub-Saharan Africa, finding that projects utilizing agricultural farm residues claim the most benefits, while those using industrial forest residues claim the fewest.