From June to September this year, Álvaro Martín Morán conducted his research secondment at the University of Eastern Finland focusing on hydrogen and the circular economy. During this period, he examined the regulatory aspects governing water as part of hydrogen’s sustainable development pathway. This experience proved truly enriching, combining expertise and strengthening research insights. A heartfelt thank you to Professors Kim Talus and Sirja-Leena Penttinen for their incredibly warm welcome and support at the University of Eastern Finland. The secondment in beautiful Joensuu was both productive and memorable, demonstrating how hydrogen continues to serve as a bridge for collaboration and a more sustainable future in the THERESA