University of Canterbury researchers, Professor Andy Nicol and Associate Professor David Dempsey, have contributed to an International Energy Agency (IEA) report on underground hydrogen storage (UHS) technology. The report emphasizes the significance of UHS in balancing energy supply and demand, reducing carbon emissions, and improving energy security as the world shifts towards renewable energy sources. It discusses the potential uses of hydrogen in various sectors such as transportation, buildings, and industry, highlighting its role in storing electricity and decarbonizing industrial processes. The focus on UHS is driven by its potential to support renewable energy integration and contribute to a low-carbon future. The report assesses the current state of UHS technology, comparing advancements in efficiency and safety with previous methods, and explores the environmental and economic impacts of widespread UHS adoption. It underscores the need for global cooperation to address challenges and ensure the reliability of UHS. The research includes the examination of storage options in porous reservoirs, salt caverns, and other spaces, with an emphasis on safety and validation testing. The report also outlines the economic benefits of UHS, emphasizing the importance of profitability for companies to drive adoption. Policy recommendations are provided to support the implementation of UHS, with a focus on regions and countries leading in this technology. Looking ahead, the report identifies future research and development steps for UHS, with both researchers seeing it as a key component in the global energy landscape in the coming years. The collaborative efforts of academia, industries, and countries are deemed essential for the successful deployment of UHS technology.