Green hydrogen steelmaking is a new - generation steel - making technology that has emerged in recent years, which is of great significance for the decarbonization of the steel industry. Traditionally, steelmaking is a carbon - intensive process, mainly using coal - based reducing agents, resulting in a large amount of carbon dioxide emissions. In contrast, green hydrogen steelmaking uses green hydrogen to replace traditional reducing agents. Hydrogen reacts with iron ore, such as iron oxide, to extract iron, and the by - product is only water. For example, in the pilot project of EM Steel and Masdar, green hydrogen is used to extract iron from iron ore, which can reduce CO2 emissions in steelmaking by up to 95 percent. This technology can help the steel industry achieve significant carbon reduction, and promote the steel industry to move towards a green and sustainable development path.