This talk at the 61st Annual Meetings of Western Regional Science Association, Scottsdale, Arizona, Feb 17th – Feb 20th, is based on the paper by Kakderi, C., Komninos, N., Panori, A., & Oikonomaki, E. (2021). Next city: Learning from cities during Covid-19 to tackle climate change. Sustainability 13 (6). The Covid-19 crisis showed that a…