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Nature-based solutions offer an exciting prospect for resilience building and advancing urban planning to address complex urban challenges simultaneously. In this article, we formulated through a coproduction process in workshops held during the first IPCC Cities and Climate Science Conference in Edmonton, Canada, in March 2018, a series of synthesis statements on the role, potential, and research gaps of nature-based solutions for climate adaptation and mitigation. We address interlocking questions about the evidence and knowledge needed for integrating nature-based solutions into urban agendas. We elaborate on the ways to advance the planning and knowledge agenda for nature-based solutions by focusing on knowledge coproduction, indicators and big data, and novel financing models. With this article, we intend to open a wider discussion on how cities can effectively mainstream nature-based solutions to mitigate and adapt to the negative effects of climate change and the future role of urban science in coproducing nature-based solutions. [ABSTRACT FROM AUTHOR]

This paper presents a typology of ecological injustice hotspots for targeted design of nature-based solutions to guide planning and designing of just cities. The typology demonstrates how the needs and capabilities of nonhuman nature can be embedded within transitions to multi- and interspecies relational futures that regenerate and protect urban social-ecological systems. We synthesise the findings of previous quantitative and qualitative analyses to develop the Ecologically Just Cities Framework that (1) works as a diagnostic tool to characterise four types of urban ecological injustices and (2) identifies nature-based planning actions that can best respond to different types of place-based ecological injustices. [ABSTRACT FROM AUTHOR]