Retirement? Jorgen Randers does not know. At 77, the Norwegian researcher continues to pound the pavement worldwide, a tireless Sisyphus scientist who still seeks to alert humanity to the climate emergency. The co-author of the report Limits to growth (Ed. Rude de l’Echiquier), published in 1972, was in Lausanne last June, invited by E4San institute created by the University of Lausanne, EPFL and IMD to reflect on social issues related to the economy.