Hydrogen, the most abundant chemical element on Earth, has seen a surge in global demand as a fuel, with green hydrogen emerging as a promising environmentally friendly energy source. Green hydrogen is produced through electrolysis, using renewable energy to split water into hydrogen and oxygen, thus reducing carbon emissions. This method could prevent the release of 830 million tonnes of CO2 annually, contributing significantly to global decarbonization efforts. Green hydrogen plays a crucial role in decarbonizing sectors like heavy industry, shipping, and transportation, where direct electrification is challenging. It can serve as a clean energy source for industries like steelmaking and cement production, reducing reliance on fossil fuels and acting as an energy storage solution to balance renewable energy supply and demand. While the production cost of green hydrogen remains a concern, advancements in technology and increased investment in renewable energy are expected to drive costs down, making green hydrogen more economically viable. This shift towards sustainable energy solutions aligns with global decarbonization targets and supports a transition to a resilient energy system. Hydrogen's versatility extends beyond energy production to applications in electricity generation, energy storage, and transportation. As countries like the United States, Russia, China, France, and Germany embrace hydrogen fuel, with Japan aspiring to become a hydrogen economy, the future impact of green hydrogen is promising. From generating electricity and drinking water to enabling sustainable mobility solutions in heavy transport, aviation, and maritime sectors, green hydrogen offers a pathway to a cleaner, more sustainable energy future.