A Quality Infrastructure Roadmap for green hydrogen 20 illing bar In partnership with: Physikalisch-Technische Bundesanstalt Braunschweig und Berlin National Metrology Institute © IRENA 2024 Unless otherwise stated, material in this publication may be freely used, shared, copied, reproduced, printed and/or stored, provided that appropriate acknowledgement is given of IRENA as the source and copyright holder. Material in this publication that is attributed to third parties may be subject to separate terms of ...