The article discusses the increasing global demand for energy and the necessity to balance this with reducing carbon dioxide emissions. Green hydrogen is highlighted as a crucial tool in linking renewable electricity with various applications, offering versatility in decarbonising sectors such as heavy transport, steel production, and power generation. The article emphasizes that green hydrogen, produced through water electrolysis using renewable electricity, is the only genuinely zero-carbon option for hydrogen production. It mentions that globally, countries are embedding green hydrogen into their decarbonisation strategies to limit global warming. In India, the decreasing costs of renewable energy, particularly solar electricity, present an opportunity for the country to lead in green hydrogen production. India aims to reduce green hydrogen prices to below $2 per kg by 2030, making it competitive with traditional energy sources. The article also explains the different classifications of hydrogen production, with green hydrogen being the cleanest form, blue hydrogen utilizing natural gas with carbon capture, gray hydrogen produced from natural gas or coal without capturing emissions, and pink hydrogen generated through electrolysis using nuclear power. It concludes by emphasizing green hydrogen's scalability and zero-carbon credentials as essential in the global energy transition.