Technological revolutions have increased the world's wealth unevenly and in ways that have accelerated climate change. This report argues that achieving The Paris Agreement's objectives would require a massive transfer of existing and commercially proven low-carbon technologies (LCT) from high-income to developing countries where the bulk of future emissions is expected to occur. This mass deployment is not only a necessity but also an opportunity: Policies to deploy LCT can help countries achieve economic and other development objectives, like improving human health, in addition to reducing greenhouse gases (GHGs). Additionally, LCT deployment offers an opportunity for countries with sufficient capabilities to benefit from participation in global value chains and produce and export LCTs. Finally, the report calls for a greater international involvement in supporting the poorest countries, which have the least access to LCT and finance and the most underdeveloped physical, technological, and institutional capabilities that are essential to benefit from technology.

This report provides actionable advice on how to design and implement fiscal policies for both development and climate action. Building on more than two decades of research in development and environmental economics, it argues that well-designed environmental tax reforms are especially valuable in developing countries, where they can reduce emissions, increase domestic revenues, and generate positive welfare effects such as cleaner water, safer roads, and improvements in human health. Moreover, these reforms need not harm competitiveness. New empirical evidence from Indonesia and Mexico suggests that under certain conditions, raising fuel prices can actually increase firm productivity. Finally, the report discusses the role of fiscal policy in strengthening resilience to climate change. It provides evidence that preventive public investments and measures to build fiscal buffers can help safeguard stability and growth in the face of rising climate risks. In this way, environmental tax reforms and climate risk-management strategies can lay the much-needed fiscal foundation for development and climate action.