The document discusses the design and implementation of green public investment programs aimed at achieving national environmental, climate-related objectives, and socio-economic development. It outlines the components of these programs, including a programmatic approach, sectoral focus, and phased implementation, and highlights the role of government and private sector collaboration to leverage investments for clean and socially beneficial projects. Additionally, it describes the support the OECD provides through policy tools, technical assistance, and capacity development to ensure effective implementation of green public investments.