Editing IPCC:AR6/SR15/Chapter-5 (section)

=== Sustainable Development Pathways to 1.5°C ===

'''Sustainable development broadly supports and often  enables  the fundamental societal and systems  transformations that  would be required for limiting warming to 1.5°C above pre- industrial levels ( ''high confidence'' ).''' Simulated pathways that feature the most sustainable worlds (e.g., Shared Socio-Economic Pathways (SSP) 1) are associated with relatively lower mitigation and adaptation challenges and limit warming to 1.5°C at comparatively lower mitigation costs. In contrast, development pathways with high fragmentation, inequality and poverty (e.g., SSP3) are associated with comparatively higher mitigation and adaptation challenges. In such pathways, it is not possible to limit warming to 1.5°C for the vast majority of the integrated assessment models ( ''medium evidence,'' ''high agreement'' ). {5.5.2} In all SSPs, mitigation costs substantially increase in 1.5°C pathways compared to 2°C pathways. No pathway in the literature integrates or achieves all 17 SDGs ( ''high confidence'' ). {5.5.2} Real-world experiences at the project level show that the actual integration between adaptation, mitigation and sustainable development is challenging as it requires reconciling trade-offs across sectors and spatial scales ( ''very high confidence'' ). {5.5.1}

'''Without  ''' '''societal   transformation   and    rapid    implementation of  ambitious  greenhouse  gas   reduction   measures,  pathways to limiting warming to 1.5°C and achieving sustainable development  will  be  exceedingly  difficult,  if   not   impossible, to achieve ( ''high confidence'' ).''' The potential for pursuing such pathways differs between and within nations and regions, due to different development trajectories, opportunities and challenges ( ''very'' ''high confidence'' ). {5.5.3.2, Figure 5.1} Limiting warming to 1.5°C would require all countries and non-state actors to strengthen their contributions without delay. This could be achieved through sharing efforts based on bolder and more committed cooperation, with support for those with the least capacity to adapt, mitigate and transform ( ''medium evidence, high agreement'' ). {5.5.3.1, 5.5.3.2} Current efforts towards reconciling low-carbon trajectories and reducing inequalities, including those that avoid difficult trade-offs associated with transformation, are partially successful yet demonstrate notable obstacles ( ''medium evidence, medium agreement'' ). {5.5.3.3, Box 5.3, Cross-Chapter Box 13 in this chapter}

'''Social justice and equity are core aspects of climate-resilient development pathways for transformational social change. Addressing challenges  and  widening  opportunities  between and  within  countries  and  communities  would  be  necessary   to achieve sustainable  development  and  limit  warming  to  1.5°C, without making the poor and disadvantaged worse  off ( ''high confidence'' ).''' Identifying and navigating inclusive and socially acceptable pathways towards low-carbon, climate-resilient futures is a challenging yet important endeavour, fraught with moral, practical and political difficulties and inevitable trade-offs ( ''very high confidence'' ). {5.5.2, 5.5.3.3, Box 5.3} It entails deliberation and  problem-solving processes to negotiate societal values, well-being, risks and resilience and to determine what is desirable and fair, and to whom ( ''medium evidence, high agreement'' ). Pathways that encompass joint, iterative planning and transformative visions, for instance in Pacific SIDS like Vanuatu and in urban contexts, show potential for liveable and sustainable futures ( ''high confidence'' ). {5.5.3.1, 5.5.3.3, Figure 5.5, Box 5.3, Cross-Chapter Box 13 in this chapter}

'''The fundamental societal and systemic changes to achieve sustainable development, eradicate poverty and reduce inequalities while limiting warming to 1.5°C would require  meeting a set of institutional, social, cultural, economic and technological conditions''' '''( ''high confidence'' ).''' The  coordination and monitoring of policy actions across sectors and spatial scales is essential to support sustainable development in 1.5°C warmer conditions ( ''very high confidence'' ). {5.6.2, Box 5.3} External funding and technology transfer better support these efforts when they consider recipients’ context-specific needs ( ''medium evidence, high'' ''agreement'' ). {5.6.1} Inclusive processes can facilitate transformations by ensuring participation, transparency, capacity building and iterative social learning ( ''high confidence'' ). {5.5.3.3, Cross-Chapter Box 13, 5.6.3} Attention to power asymmetries and unequal opportunities for development, among and within countries, is key to adopting 1.5°C-compatible development pathways that benefit all populations ( ''high confidence'' ). {5.5.3, 5.6.4, Box 5.3} Re-examining individual and collective values could help spur urgent, ambitious and cooperative change ( ''medium evidence, high agreement'' ). {5.5.3, 5.6.5}

<span id="x-citation"></span>