Climate Exp0 was the first conference organised by the COP26 Universities Network and 'Rete delle Universita' per lo sviluppo Sostenibile (Italian University Network for Sustainable Development), sponsored by UK Research and Innovation (UKRI), Cambridge University Press and All4Climate Italy 2021, with support from UN Climate Change Conference UK 2021. It took place on 17–21 May 2021. All of the content from Climate Exp0 is available free and on-demand via https://www.cambridge.org/engage/coe/event-details/609c4e8ee519e337ef75a5e1. You can also watch video highlights via https://climateexp0.org/highlights/. For the latest from the COP26 Universities Network, follow #COP26Universities or visit https://www.gla.ac.uk/research/cop26/.