Ugo Bardi is a member of the Department of Earth Sciences at the University of Florence, where he teaches physical chemistry. His research interests include mineral resources, renewable energy, and system dynamics applied to economics. He is a member of the Club of Rome, of the scientific committee of the Association for the Study of Peak Oil (ASPO), and Climalteranti, a group active in climate science. He is also founder and former president of the Italian chapter of ASPO and chief editor of Frontiers in Energy Systems and Policy. His articles have appeared on The Oil Drum, Resilience (formerly The Energy Bulletin, Financial Sense, and Cassandra’s Legacy. His previous books include The Limits to Growth Revisited.