The urgency of the climate crisis we are currently facing requires the exploration of alternative paradigms for socio-economic organization. Social Solidarity Economy (SSE) refers to a set of practices aiming at changing the way we perceive and enact economy. These practices are expected to abide by certain standards in terms of both respect to social benefit and environmental sustainability. However, the linkage between SSE and efforts to mitigate the climate crisis has not been systematically explored yet. This on-line dossier intends to do exactly that. To offer theoretical insights and practical examples of how SSE might be conducive to the urgent goals set against climate change. We consider these insights and examples inspiring if we are to effectively address the challenges of our times without a naive recourse to the technofix obsessions of geoengineering.