Hydrogen, the most abundant chemical element on Earth, is garnering increasing attention as a key player in sustainable energy solutions. Green hydrogen, produced through electrolysis using renewable energy sources like wind, solar, or hydropower, stands out as an environmentally friendly alternative to traditional grey hydrogen production methods that emit significant carbon dioxide. The International Energy Agency (IEA) highlights the potential benefits of green hydrogen, estimating that its widespread adoption could prevent the release of 830 million tonnes of CO2 annually. This cleaner form of hydrogen is essential for decarbonizing hard-to-electrify sectors such as heavy industry and transportation, offering a pathway to lower carbon emissions and combat climate change. While the production of green hydrogen currently comes at a higher cost compared to conventional methods, ongoing advancements in technology and the growing affordability of renewable energy sources are expected to drive down production costs. This trend will make green hydrogen more economically feasible and support its role in achieving global decarbonization targets. Projects like Hycarus and Cryoplane in the European Union are already exploring the use of green hydrogen in aviation, showcasing its versatility and potential in various industries. The impact of green hydrogen extends beyond decarbonization efforts. Its applications in energy storage, electricity generation, and transportation offer solutions for a sustainable energy future. By harnessing the power of green hydrogen, countries around the world, from the United States to Japan, are stepping into a cleaner energy paradigm. As technology evolves and investments grow, green hydrogen is poised to become a prominent fuel of the future, contributing to a resilient and sustainable energy system.