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A megadiverse county, Costa Rica is known globally for its success in reversing deforestation and pursuing a growth model based on the sustainable use of its environmental resources. However, energy use and related greenhouse gas emissions increased in the last decade. Private cars are a major and growing source of emissions affecting climate and air quality. Waste disposal still relies on landfills, and much wastewater is untreated. Costa Rica’s extensive protected area network and pioneering programme of payments for ecosystem services have helped reduce biodiversity loss and extend forests’ carbon sequestration capacity. However, more should be done to tackle pressures on biodiversity from development of infrastructure and settlements, tourism, farming and fishing. The sheer scale of investment needed to achieve the Sustainable Development Goals calls for improving the efficiency of public spending, mobilising private finance, strictly enforcing regulations and providing adequate incentives. This is the first OECD Environmental Performance Review of Costa Rica. It evaluates the country’s progress towards sustainable development, with a special chapter focusing on biodiversity, and provides 52 recommendations.

Water-related risks are intrinsically linked to both climate and nature challenges and can be closely tied to socio-economic challenges, such as poverty, food security, and domestic and international conflicts. There is increasing evidence that water-related risks are financially material across actors in the financial system, and further still, that there may be important implications for financial stability. However, a review of current practices indicates that these risks are not fully captured by current approaches to assessing risk. This working paper explores how the financial sector understands the concept of financial materiality as a lever for decision making on water-related climate and nature risks. The paper also looks at how regulatory and supervisory guidance considers water in the context of climate and nature risks, and finally how sustainable finance tools and initiatives can support market participants in gaining an improved understanding of water-related risks.

This paper presents a methodological supervisory framework to help central banks and financial supervisors assess biodiversity-related financial risks, impacts and dependencies in the financial sector, including transmission channels for physical and transition risks. This framework is designed to translate biodiversity risks into financial risks. It draws on a previous mapping of existing approaches, while also accounting for broader nature-related financial risks. While acknowledging different national circumstances, this methodological framework is designed to be applicable broadly for central banks, supervisors and commercial banks across different countries.

Since the adoption of the Paris Agreement, governments and economic actors have increasingly been setting greenhouse gas emissions reduction or net zero targets. Amidst risks of delayed action and greenwashing, there is need to understand whether climate related targets and transition plans are consistent with the Paris Agreement. Climate change mitigation scenarios can be used as inputs to design such targets and plans, and as benchmarks to assess progress towards them. In this context, this paper proposes criteria for selecting global climate change mitigation scenarios that can be considered consistent with the Paris Agreement temperature goal and emissions objectives, based on state-of-the-art literature on climate science and mitigation scenarios.

Climate change mitigation scenarios are a key forward-looking input for a range of financial sector analyses and assessments. The inaccurate use of mitigation scenarios can, however, contribute to unintended incentives, environmental integrity concerns, and greenwashing risks. This paper aims to inform climate change mitigation scenario providers, financial sector participants and stakeholders, and climate policymakers on how they may contribute to improved use of scenarios for the purposes of target setting and alignment assessments in the financial sector. To do so, the paper analyses climate change mitigation scenarios currently used for these purposes, based on the following analytical dimensions: consistency with the Paris Agreement, practicality, and underlying assumptions.

Carbon lock-in occurs when high-emission infrastructure or assets continue to be used, despite the possibility of substituting them with low-emission alternatives, thereby delaying or preventing the transition to near-zero or zero-emission alternatives. Transition finance, which focuses on the dynamic transformation and decarbonisation of hard-to-abate sectors, frequently faces the issue of carbon lock-in, particularly in considerations of investment feasibility and eligibility. Despite most transition finance approaches incorporating lock-in avoidance as a core principle, existing transition instruments and approaches put in place varying or limited mechanisms to prevent lock-in. Building on the OECD Guidance on Transition Finance, this report takes stock of how carbon lock-in risk is addressed in existing transition finance approaches (such as taxonomies, roadmaps, or guidance), financial instruments, and relevant public and private investment frameworks and methodologies. The report provides good practices on the integration of credible mechanisms to prevent carbon lock-in, address greenwashing risks and build confidence in the market. It can inform both public and private actors in the development of transition finance approaches, standards for green, transition and sustainability-linked debt, frameworks for corporate transition plans, or broader climate-related disclosure frameworks.