Climate Change

The economy is embedded in, and dependent on, nature. Yet economic activity is degrading nature at an unprecedented pace. Interacting with climate change, nature loss and transformation generates significant threats to the global economy and financial system. However, work on the implications of nature-related risks for macroeconomic and financial sector policies remains at an early stage. This note seeks to contribute to this emerging policy space in three main ways: (i) it proposes a conceptual framework for understanding nature-related risks by mapping out macroeconomic transmission channels, emphasizing their impact on the economy and financial systems through “double materiality;” (ii) it conducts empirical analysis, finding that nearly 38 percent of bank loans of the 100 largest global banks are to harmful subsidies-dependent sectors and 44 percent are exposed to conservation areas under the Global Biodiversity Framework, and that industries most exposed to nature degradation are not well prepared to manage these risks; and (iii) it discusses takeaways for macroeconomic and financial sector policies and frameworks.

The Government of Seychelles is committed to promoting environmental sustainability and climate resilience, as demonstrated by its decision to prioritize climate as one of the six key areas in the National Development Strategy for 2024-2028 and through the agreements made under the IMF's Resilience and Sustainability Facility, established in May 2023. A central component of these efforts is the identification of climate-related expenditures. This report outlines the development and phased implementation of a Climate Budget Tagging (CBT) framework in Seychelles. CBT is a tailored process that involves identifying, measuring, and monitoring climate-relevant spending across government, serving as a powerful tool to integrate climate change considerations into the budget cycle. By emphasizing the importance of climate change in resource allocation and execution, CBT enhances the government's ability to prioritize climate action, with the ultimate goal of ensuring alignment with Seychelles' climate commitments and Nationally Determined Contributions.

Selected Issues

Using quarterly temperature and sectoral value-added data for a large sample of advanced economies (AEs) and emerging markets and developing economies (EMDEs), this paper uncovers nuanced effects of temperature on economic activity. For EMDEs, hotter spring and summer temperatures reduce growth in real value-added of manufacturing, and most significantly, of agriculture, while a warmer winter boosts it. For advanced countries (AEs), a hotter spring hurts growth in real value-added of all considered sectors: services, manufacturing and agriculture. For both country groups, the negative effect of a hotter spring is larger and more persistent than the positive effect of a warmer winter. Furthermore, the adverse impacts of hotter temperatures in advanced economies have accentuated in recent decades. This result suggests increased vulnerability to rising temperatures.

Housing represents the largest asset and liability, in the form of mortgages, on most national balance sheet. For most households it is their largest investment, and when mortgages are required also represents the largest component of household debt. It is also directly tied to financial markets, both the mortgage market and insurance sector. Although many countries have a rich set of housing censuses and statistics, others have large data gap in this area and therefore struggle to formulate effective policies. This paper proposes an approach to construct a global census of residential buildings using opensource satellite data. Such a layer can be used to assess the extent these buildings are exposed to climate hazards and how their production and consumption, in turn, affect the climate. The approach we propose could be scaled globally, combining existing layers of building footprints, climate and socioeconomic data. It adds to the ongoing effort of compiling spatially explicit and granular climate indicators to better inform policies. As a case study, we compute selected indicators and estimate the extent of residential properties exposure to riverine flood risk for Kenya.

Climate policy at the subnational level is sometimes framed as being counterproductive, because climate change is considered a collective action problem that can be best addressed in a coalition that should be as large as possible. Using comprehensive data from US states on climate policy and policy outcomes, we show that state-level policy is effective in accelerating the adoption of solar energy. Crucially, however, state policies also have positive spillovers to other states, by making it more likely that neighboring states adopt climate policy as well. By proportionally attributing the spillover effects, we find that many US states achieve more climate benefits through the spillovers to other states than within their own jurisdiction. In a further step, we distinguish between climate policies in the energy sector and policies addressed either at other sectors or greenhouse gas emission (GHG) reductions generally. We find that climate policies in the energy sector are distinct from other climate policies in two ways: They have a significant effect on solar capacity growth and they diffuse more broadly.