Hydrogen energy is increasingly seen as a promising solution to combat climate change by offering a green alternative to traditional fossil fuels. Countries worldwide, such as China and the European Union, are heavily investing in hydrogen technologies, aiming to reduce emissions and promote sustainability. While hydrogen is considered clean energy as it only produces water vapor and heat when burned, the majority of hydrogen production globally still comes from fossil fuels, particularly natural gas. However, the cleanest form of hydrogen, known as 'green' hydrogen, produced using renewable electricity like solar or wind power, remains a small fraction of the total output due to higher production costs. Green hydrogen is mainly utilized in transportation, with over 72,000 hydrogen fuel cell vehicles currently on the roads, primarily in countries like China, the US, South Korea, Japan, and Germany. Despite advancements, the lack of infrastructure, such as hydrogen refueling stations, hinders its accessibility compared to traditional gasoline. Countries like China and the US are leading the way in promoting green hydrogen projects. China, despite being the largest hydrogen producer, has a low percentage of renewable production but aims to increase it significantly by 2025. In the US, the Infrastructure Investment and Jobs Act has allocated substantial funds for clean hydrogen projects to drive down costs and make it more affordable for consumers. The global hydrogen industry is rapidly growing, with increasing investments and initiatives aimed at reducing emissions and transitioning towards a more sustainable future.