This report synthesizes the results of country and sector studies on the economic costs and benefits of unilateral and regional actions on climate change in the Asian Development Bank's six South Asia developing members, namely Bangladesh, Bhutan, India, the Maldives, Nepal, and Sri Lanka. The study takes into account the different scenarios and impacts projected across vulnerable sectors and estimates the total economic loss throughout the 21st century and amount of funding required for adaptation measures to avert such potential losses. It is envisioned to strengthen decision-making capacities and improve understanding of the economics of climate change for the countries in South Asia.

This report provides a review of the economics of climate change in the Southeast Asia, with a particular focus on Indonesia, Philippines, Singapore, Thailand, and Viet Nam. It confirms that the region is highly vulnerable to climate change and demonstrates that a wide range of adaptation measures are already being applied. The report also shows that the region has a great potential to contribute to greenhouse gas emission reduction, and that the costs to the region and globally of taking no early action against climate change could be very high. The basic policy message is that efforts must be made to apply all feasible and economically viable adaptation and mitigation measures as key elements of a sustainable development strategy for Southeast Asia. It also argues that the current global economic crisis offers Southeast Asia an opportunity to start a transition towards a climate-resilient and low-carbon economy by introducing green stimulus programs that can simultaneously shore up economies, create jobs, reduce poverty, lower carbon emissions, and prepare for the worst effects of climate change.

The South Asia region is both a large contributor to climate change and also one of the regions most vulnerable to climate change. This paper provides an overview of the region’s vulnerabilities, national committments to mitigate emissions, and national policies to adapt to a changing climate. The paper also discusses policy measures that may be needed to make further progress on both mitigation and adapatation. Our analysis suggests that while substantial progress is being made, there remains scope to adopt a more cohesive strategy to achieve the region’s goals—including by improving the monitoring and tracking of adaptation spending, and by laying the groundwork to equitably increase the effective price of carbon while protecting low-income and vulnerable households in the region.

This report assesses the cost of adaptation to climate change across a range of future climate scenarios and investment options. We focus on offsetting climate change impacts on hunger through investment in agricultural research, water management, and rural infrastructure in developing countries. We link climate, crop, water, and economic models to (1) analyze scenarios of future change in the agriculture sector to 2050 and (2) assess trade-offs for these investments across key Sustainable Development Goals (SDGs) for poverty, hunger, and water. Our reference projections show that climate change slows progress toward eliminating hunger, with an additional 78 million people facing chronic hunger in 2050 relative to a no-climate-change future, over half of them in Africa south of the Sahara. Increased investments can offset these impacts. Achieving this would require that annual investment in international agricultural research increase from US$1.62 billion to US$2.77 billion per year between 2015 and 2050. Additional water and infrastructure investments are estimated to be more expensive than agricultural R&D at about US$12.7 billion and US$10.8 billion per year, respectively, but these address key gaps to support transformation toward food system resiliency. Findings on ranges of costs and trade-offs and complementarities across SDGs will help policymakers make better-informed choices between alternative investment strategies.

Climate change adaptation in South Asia is redefining the roles of different actors in the governance processes. The existing governance lack capacity, knowledge, and leadership skills to manage the uncertainties and challenges posed by climate change. This book aims to explain how the governance of climate change adaptation and mitigation is being shaped in the region and how climate change is impacting upon the governance of natural resources. Although the focus is on South Asia, the editors draw a wide range of contributions from northern and southern communities and across various agro-ecological contexts. Climate Change Governance and Adaptation: Case Studies from South Asia sees the changing climate not only as an environmental problem but as a societal challenge and discusses the governance challenges from an interdisciplinary social science perspective across different levels: local, state, and national. Discusses also the challenges and opportunities for increasing the resilience of the society through effective governance around climate change. A top down approach to govern climate change adaptation may not yield desired outcomes; instead the book emphasizes the need to integrate issues of equity, into climate governance and polices. The lessons learned from different cases across South Asia help readers have a better and deeper understanding of the relationships between governance and climate change. Given the diversity of themes covered, this book will appeal not only to researchers and practitioners in the climate change community, but also to those with a broader interest in governance processes.

Climate change represents an increasing threat to the continued development of the people, preservation of ecosystems, and economic growth of Asia and the Pacific. Mainstreaming climate risk management in all aspects of development is thus key to an effective transition to climate-resilient development pathways. ADB's climate risk management framework aims to reduce risks resulting from climate change to investment projects in Asia and the Pacific. A key step in this framework is the technical and economic valuation of climate-proofing measures. This report describes the conduct of the cost-benefit analysis of climate proofing investment projects. An important message is that the presence of uncertainty about climate change does not invalidate the conduct of the economic analysis of investment projects, nor does it require a new type of economic analysis. However, the presence of uncertainty does require a different type of decision-making process in which technical and economic expertise combine to present decision makers with the best possible information on the economic efficiency of alternative designs of investment projects.