Accelerated and substantial investment in adaptation and mitigation technologies are required to address the challenges of climate change and secure a low carbon and sustainable energy future. Active participation and investment of the private sector is critical for the transition to low carbon footprint, high resource sustainability, high energy efficient and climate-resilient economies. Global Best Practice Group’s expert was retained by the Asian Development Bank to identify a range of appropriate financing instruments to be applied to promote green growth in the agriculture, environment and natural resources sectors of SE Asian countries. Following a review of existing global and regional environmental capital markets and ADB’s public and private sector financing instruments, an Environment Sector PPP and private sector Investment Opportunities and financing options report was developed. A Strategic Financing Framework was proposed to support private sector involvement in climate change adaptation measures, technologies, and initiatives that provide sustainable solutions. Natural resource management, creation of climate resilient infrastructure, food security and GHG emission reduction were identified as the core concentration areas. Pilot projects for clean tech, capacity building and improvements in the regulatory framework were recommended. All pilots included a sustainable private sector investment component. Options and opportunities to introduce and scale up Public Private Partnerships for financing environment sector operations were also assessed and an Environment Investment Fund structure was recommended to finance climate proof and disaster risk resilient projects.