Long-term global scenarios have underpinned research and assessment of global environmental change for four decades. Over the past ten years, the climate change research community has developed a scenario framework combining alternative futures of climate and society to facilitate integrated research and consistent assessment to inform policy. Here we assess how well this framework is working and what challenges it faces. We synthesize insights from scenario-based literature, community discussions and recent experience in assessments, concluding that the framework has been widely adopted across research communities and is largely meeting immediate needs. However, some mixed successes and a changing policy and research landscape present key challenges, and we recommend several new directions for the development and use of this framework.

Ambitious climate policies, as well as economic development, education, technological progress and less resource-intensive lifestyles, are crucial elements for progress towards the UN Sustainable Development Goals (SDGs). However, using an integrated modelling framework covering 56 indicators or proxies across all 17 SDGs, we show that they are insufficient to reach the targets. An additional sustainable development package, including international climate finance, progressive redistribution of carbon pricing revenues, sufficient and healthy nutrition and improved access to modern energy, enables a more comprehensive sustainable development pathway. We quantify climate and SDG outcomes, showing that these interventions substantially boost progress towards many aspects of the UN Agenda 2030 and simultaneously facilitate reaching ambitious climate targets. Nonetheless, several important gaps remain; for example, with respect to the eradication of extreme poverty (180 million people remaining in 2030). These gaps can be closed by 2050 for many SDGs while also respecting the 1.5 °C target and several other planetary boundaries.

The Sustainable Development Goals (SDGs) of 2015 form a universal and integrated policy agenda to be realized over the next 15 years. One of the targets is the attainment of policy coherence for sustainable development, which requires the individual goals to become interlinked. This article's main research interest lies in assessing how national governments and their competent ministries interpret and strive to implement the target of policy coherence for sustainable development. Drawing on the Voluntary National Reviews submitted in 2016 and 2017 by six countries, this study shows that at the national level, the links among the different goals and the idea of policy integration are subject to divergent interpretations. The differences observed do not stem from the interlinkages of the SDGs as defined by the United Nations, neither do they result from different levels of income or degree of political centralization. Instead, the respective domestic policy‐making processes are likely to explain the implementation strategies adopted by the individual states. For example, the implementation approach adopted by the government of Turkey suggests that path‐dependency is critical, whereas the Colombian approach consists of defining new policy measures and institutional arrangements.

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