Hydrogen is being hailed as the future of clean fuels due to its potential to combat climate change by emitting only water when burned. Despite being the most abundant element in the universe, pure hydrogen is difficult to obtain and is currently mainly produced using fossil fuels, releasing significant CO₂ emissions in the process. Gray hydrogen, the most common type, is produced by breaking down natural gas and emits large amounts of CO₂, while blue hydrogen, although slightly cleaner, still releases harmful emissions. Research is focusing on green hydrogen, which is manufactured using clean and renewable energy sources like wind or solar power, significantly reducing harmful emissions. However, challenges remain, such as the high cost of electrolyzers and the reliability of renewable energy sources for continuous hydrogen production. Scientists emphasize the importance of developing cleaner methods of hydrogen production to fully realize its potential as a clean fuel for the future.