A groundbreaking research collaboration spearheaded by the Environmental Defense Fund (EDF) is embarking on a global field study to address the hidden climate risks associated with hydrogen. This initiative, in partnership with leading academic and industry players, marks a significant step towards quantifying real-world hydrogen emissions across the entire supply chain. Despite hydrogen's crucial role in achieving net zero emissions, the potential for indirect warming from hydrogen leakage remains largely unexplored due to the lack of empirical data. The study, endorsed by key figures like Erwin Penfornis from Air Liquide and Professor Thomas Röckmann from Utrecht University, will utilize advanced hydrogen sensors to measure emissions at operational sites belonging to major companies such as Air Liquide, Shell, Air Products, and TotalEnergies. The data collected will undergo thorough analysis, anonymization, peer review, and subsequent public disclosure. Steven Hamburg, EDF's Chief Scientist, emphasized the importance of data-driven insights in shaping future policies and investments in the hydrogen sector. This comprehensive study, funded by philanthropic sources, is projected to continue until early 2026, aiming to provide a solid foundation for leveraging hydrogen's potential in realizing climate objectives and fostering sustainability.