The refining and chemical sectors account for a significant portion of global CO2 emissions, with hydrogen production playing a major role. Currently, most hydrogen is produced using fossil fuels, contributing to emissions. Transitioning to green hydrogen, produced through water electrolysis powered by renewable energy, is crucial for decarbonizing these sectors. The article focuses on the benefits of green hydrogen adoption in ammonia production and refining processes. Green ammonia, with its potential applications beyond fertilizers, offers a promising avenue for reducing carbon footprints. Similarly, using green hydrogen in the refining sector can lead to a significant reduction in carbon emissions and improve fuel production efficiency. Hitachi Energy offers comprehensive solutions to support large-scale green hydrogen projects, ensuring safe and efficient production. Their integrated solutions cover grid connection challenges, power supply optimization, and asset health management for electrolyzer plants. By facilitating the transition to green hydrogen and providing operational support, Hitachi Energy aims to help operators lower costs and enhance efficiency. The article concludes that the global market for low-emissions hydrogen is poised to grow substantially by 2050, highlighting the importance of green hydrogen in decarbonizing key industries.