The fifth ediion of the EFL/EBZ Summer School has come to an end. Thanks to the perfect host, EBZ Businesschool in Bochum our 30 participants from five European countries had a great time. It was a great experience of mutual learning and exchange on topics ranging from European approaches of the decarbonisation challenge, how best to retrofit existing buildings, the effects of the recent energy inflation on energy poverty, the financial sector taking ESG investments increasingly serious and much more. The participants formed 5 groups, in which a sustainability strategy needed to be developed and be presented on Thurday 7 July. These groups showed their creativity and presented highly interested solutions for a real business case in the city of Bochum. Thanks to all involved, we hope for another succesful edition in 2023 !