As countries seek to become climate neutral, green hydrogen (hydrogen produced from renewable  energy) and synthetic fuels derived from green hydrogen will have a key role to play in the energy transition, particularly in hard-to-abate sectors. More specifically, green hydrogen can play a major role in replacing fossil fuels in non-energy processes and products, such as steel, fertilisers and plastics production. According to IRENA’s 1.5°C Scenario, described in the World Energy Transition Outlook (IRENA, 2021), green hydrogen and its derivatives will account for 12% of final energy use by 2050, and together with electricity, will represent 63% of final energy consumption. Achieving decarbonisation globally will require  5 000 gigawatts (GW) of hydrogen electrolyser capacity to be installed by 2050, compared to only  0.3 GW of installed capacity in 2020 (IRENA, 2021).