Hydrogen production refers to the methods used to generate hydrogen gas, which is a clean fuel that can be used in various applications, including energy generation and transportation. The most common methods include steam methane reforming, where natural gas is heated with steam to produce hydrogen, and electrolysis, which uses electricity to split water into hydrogen and oxygen. Another method is gasification, where organic materials are converted into hydrogen and other products through high-temperature reactions. Hydrogen can also be produced from renewable sources, such as biomass or solar energy, making it a promising option for sustainable energy solutions.