The city of Calgary, Canada, hosted the World Geothermal Congress (WGC 2026), the world’s leading international event for the geothermal sector, held every three years. The conference, which took place from 8–11 June 2026, brought together approximately 1,900 participants from 88 countries, representing the world’s leading geothermal companies, research institutions, investors, technology providers, and government organizations. Hungary was represented at the event by the Hungarian Geothermal Cluster, which exhibited with its own booth. The Cluster has 40 members, including the Faculty of Science of Eötvös Loránd University (ELTE TTK), thus the research of our Hydrogeology Chair on the Buda Thermal Karst …