GoGreenNEXT will deliver a comprehensive evidence-based policy oriented approach model to convey how ecosystem health and human health are connected. We propose to follow the pathway outlined foA complex array of interrelated problems arising from climate change and biodiversity loss pose significant health risks, both today and in the future . Future risks from climate change are currently predicted to escalate (beyond planetary boundaries) and pass critical tipping points with irreversible changes to our climate with commensurate negative impacts on health, our ecosystems and our landscapes . Global, European and national policy frameworks have emerged in recent years to address this challenge, with a range of initiatives to promote mitigation, adaptation and resilience. Nature-based solutions (NBS), or actions to protect, sustainably manage, and restore natural and modified ecosystems that address societal challenges effectively and adaptively, simultaneously benefiting people and nature, are among the strategies that have emerged to reverse the degradation of nature, notably in urban areas where changes are amplified. In cities, vulnerability to climate change and environmental degradation is high due to dense populations, critical infrastructure, and at-risk communities (e.g. vast differences across social-economic gradient). Cities offer an opportunity to accelerate the implementation of current solutions aligned with emerging strategies and policy initiatives (e.g. New European Bauhaus, 100 Climate Neutral and Smart Cities) combining to form what is termed a just green transition. This refers to a process of far-reaching sociotechnical change leading to a green and climate-neutral economy that preserves biodiversity and ensures social justice. GoGreenNext will address the biodiversity-climate-planetary health nexus, delivering positive policy and city/region pilot outcomes in 4 biogeographic regions across Europe and with input from best practice globally.