Green hydrogen , often heralded as the fuel of the future, holds tremendous promise in the global transition towards sustainable energy systems. As the world grapples with the urgent need to reduce greenhouse gas emissions and mitigate climate change, green hydrogen emerges as a versatile and clean energy carrier with the potential to revolutionize various sectors, including transportation, industry, and electricity generation. This article explores the concept of green hydrogen, its production methods, applications, challenges, and future prospects in the quest for a decarbonized world. Understanding Green Hydrogen Hydrogen, the most abundant element in the universe, has long been recognized as a potential energy carrier due to its high energy density and clean combustion properties. However, the conventional methods of producing hydrogen, such as steam methane reforming (SMR) and coal gasification, rely on fossil fuels and emit significant amounts of carbon dioxide (CO2), contributin