1. World Energy Outlook 2023;International Energy Agency (IEA),2023
2. Global Carbon Budget 2022;Friedlingstein;Earth Syst. Sci. Data,2022
3. The Occurrence and Geoscience of Natural Hydrogen: A Comprehensive Review;Zgonnik;Earth Sci. Rev.,2020
4. H2stations (2024) https://www.h2stations.org/wp-content/uploads/Development-HRS-worldwide-by-region-2023-.jpg (Last viewed, May 2024).
5. Cleanenergywire (2024) https://www.cleanenergywire.org/news/capacity-electrolysis-projects-planned-2030-germany-rises-87-gw-eon (Last viewed may 2024).