Humans have always lived in eras of more or less obvious crises and risks. When Ulrich Beck wrote about the risk society in 1986, he talked about risks as invisibility lacking spatial and temporal boundaries. The environmental risks of the modern society may often appear diffuse, even if, for example, the climate change dilemma has progressively become noticeable. However, this year, people on Earth have had to face a most obvious risk. The effects of Covid-19 have reached such proportions that the human world probably will never be the same again. However, the extent of jeopardies is not similar for all world inhabitants, neither are the tools to handle the risks. To face the threat and learn from it, humans need to change manners on many levels and in many social and physical areas. Some of the main questions to reflect on and discuss in this feature issue of Sustainability are: What will the most urgent role of sustainability education be now and in the future? What kind of teaching, learning and educational policies are most relevant? What issues are most crucial in sustainability education research?