Issue #33 of Cescontexto-Debates offers a series of insightful reflections on the role of the Solidarity Economy in promoting a sustainable, nature-based transformation of the urban environment. This collection of contributions stems from a dynamic exchange between practitioners and academics within the context of the webinar series on 'Solidarity Economy for Urban Regeneration in Times of Uncertainty', a thought-provoking initiative hosted by the EU-funded URBiNAT project in June 2021.