Latest Documents

The Mitigation Work Programme (MWP) was established at COP26 to urgently enhance mitigation ambition and implementation in this critical decade. This paper explores how the MWP could build on and amplify relevant existing efforts, within and outside the UNFCCC, to trigger the rapid scale up of mitigation efforts required to keep the temperature goal of the Paris Agreement within reach. As a multilateral platform backed by the legitimacy and convening power of the UNFCCC, the MWP could help to raise awareness of available tools and solutions, build momentum behind relevant ongoing mitigation-related initiatives without being prescriptive, and deliver more effective, targeted mitigation efforts across all fronts in the near-term. This paper also outlines potential options for the annual decision on the MWP which provides an important opportunity to maintain attention on the need to urgently scale up mitigation efforts and encourages learning-by-doing. The annual MWP decision could be structured around different mutually supportive elements including lessons learned from the MWP’s first year, follow-up from MWP activities and related mitigation commitments at previous COPs, synergies with other UNFCCC processes, and how to complement the global stocktake.

L’Observateur de l’action climatique est une des principales publications du Programme international pour l’action sur le climat (IPAC). Cette synthèse couvre les mesures relatives à la lutte contre les changements climatiques et les progrès accomplis en vue de la neutralité carbone dans 51 pays de l’OCDE et partenaires de l’OCDE. Cette année, le rapport contient un résumé des informations relatives aux émissions de gaz à effet de serre, une évaluation des aléas climatiques et les dernières tendances en matière de mesures relatives à la lutte contre les changements climatiques. Les décideurs politiques et les acteurs de terrain sont les destinataires de cette synthèse dont les résultats montrent que, à moins d’être plus ambitieux et d’accroître significativement l’envergure des actions en faveur du climat à l’échelle nationale, les pays ne relèveront pas le défi de la neutralité carbone.

This report analyses current trends of adaptation finance provided and mobilised by developed countries for developing countries. It explores potential action areas for international providers to scale up funding for climate change adaptation, including by unlocking the potential of the private sector. The analysis is anchored in the context of the USD 100 billion climate finance goal, initially set for 2020 and extended to 2025, while also providing insights to the broader and longer-term objective of supporting developing countries’ ability to adapt to the adverse impacts of climate change.

This report explores evidence-based action areas to increase and accelerate the mobilisation of private finance for climate action in developing countries, and the role of international public finance providers in doing so. It draws on best-available data to provide disaggregated analysis of the sectoral, geographic and other features of private finance mobilised by public climate finance and presents key economy-wide, sector-specific, and institutional challenges to private finance mobilisation. The analysis is anchored in the context of the USD 100 billion climate finance goal, initially set for 2020 and extended to 2025, while also providing insights related to mobilising private finance for climate action in developing countries more broadly.

Ce rapport présente les tendances agrégées du financement climatique annuel fourni et mobilisé par les pays développés pour les pays en développement sur la période 2013-2021. Les tendances sont présentées par thème climatique, secteur, par instrument financier et par groupe de pays bénéficiaires pour la période 2016-2021. Le rapport fournit également des recommandations clés pour les bailleurs de fonds internationaux afin d'augmenter le financement de l'adaptation et de mobiliser plus efficacement le financement privé pour l'action climatique, qui sont à la fois des priorités politiques importantes et des éléments représentants un défi à l’heure actuelle. Les recommandations de ce rapport se basent sur deux publications de l'OCDE sur l'augmentation des financements privés pour le climat et l'adaptation.

Extended Producer Responsibility (EPR) is a policy approach that makes producers responsible for their products at the post-consumer stage of the lifecycle. It has been widely adopted by governments and companies across the OECD membership and beyond and is currently most commonly used for electronics, packaging, vehicles, and tyres. The success of EPR in increasing material recovery rates has triggered a debate about expanding the use of EPR to additional product groups. Additionally, there is a debate about expanding producer responsibilities to additional impact categories, which go beyond the traditional use of EPR to cover end-of-life costs that occur at the domestic level. This paper presents a discussion of relatively novel applications of EPR to additional product groups (plastic products beyond packaging, textiles, construction materials, and food waste) and to environmental impacts (design considerations, pollution and littering) that occur throughout the product lifecycle. Based on select case studies, this report evaluates the successes and challenges that early adopters of applying the EPR approach to new product groups or additional environmental impact categories have experienced. It reviews the arguments for further application of EPR, possible limitations and provides guidance on when and how to best apply an EPR.

Climate shocks such as extreme floods and storms, droughts and heatwaves have complex, inter-connected and far-reaching consequences across multiple policy sectors and systems. Shocks in other systems, such as financial or health crises, can, in turn, affect climate challenges. Applying a systems approach to climate change helps policymakers understand linkages between issues that are treated separately and propose cross-sectoral, multi-disciplinary solutions in cities. This paper proposes a four-pronged policy framework to disentangle the different elements of economic, social, environmental, and other systems operating in cities, maximise co-benefits and manage trade-offs across systems, and build systemic climate resilience in cities. It summarises the contribution of the Working Party on Urban Policy and the Regional Development Policy Committee to the 2021-2022 OECD Horizontal Project on 'Building Climate and Economic Resilience in the Transition to a Low-Carbon Economy'.

Stressors that exhibit immunosuppression might act by different mechanisms, i.e. alter the number of cells involved in the immune response, the ability of the cells to produce cytokines, chemokines, antibodies or growth factors, the composition of the subpopulations of cells present at the site of the response, or the function of the cells. This Adverse Outcome Pathway (AOP) describes how impairment of the signaling receptor IL-1R1 in T cells can lead to impaired T cell activation and antibody production, leading to increased susceptibility to infection. The AOP focuses on the blocking of binding of IL-1 to IL-1R1, leading to the Inhibition of Nuclear factor kappa B (NF-kB). This AOP is referred to as AOP 277 in the Collaborative Adverse Outcome Pathway Wiki (AOP-Wiki).

The present Adverse Outcome Pathway (AOP) describes the linkage between lung cancer initiated from the Deposition of Energy (DoE) into a cell by a prototypic stressor such as radon gas. The multiple ionization events from DoE can directly break DNA double strands and initiate the activation of repair machinery through non-homologous end joining, an efficient, but error-prone process. When double strand breaks occur in DNA regions that transcribe critical genes, mutations generated by faulty repair may alter the function of these genes or cause chromosomal aberrations. These events alter the functions of many gene products and affect cell growth, cycling, and apoptosis. Cell proliferation is then promoted by escaping the regulatory control and forming hyperplasia in lung epithelial cells, leading eventually to lung cancer. Although the weight of evidence for this AOP is strong, uncertainties remain on dose-effect relationships across KEs, particularly for DoE delivered at low doses and dose-rates.