Green hydrogen plays a pivotal role in decarbonization by providing a clean alternative to fossil fuels across multiple sectors. Produced using renewable energy to split water via electrolysis, it generates no carbon emissions during production or use. In industry, green hydrogen can replace grey hydrogen (made from natural gas) in processes like ammonia synthesis, steelmaking, and refining, eliminating significant industrial emissions. In transportation, it powers fuel cell vehicles, emitting only water vapor. For heating, it can be used in homes and commercial buildings, replacing natural gas. Additionally, green hydrogen can store excess renewable energy, enabling greater integration of solar and wind into grids and reducing reliance on coal or gas-fired power plants. By addressing hard-to-electrify sectors and enabling renewable energy storage, green hydrogen acts as a versatile tool in global efforts to reduce carbon footprints, making it a cornerstone of decarbonization strategies worldwide.