Green hydrogen has a wide range of applications in the industrial field and is of great significance for the decarbonization and sustainable development of the industry. In the chemical industry, green hydrogen can be used as a clean feedstock, such as in the production of ammonia, methanol and other chemical products, replacing the traditional production process that relies on fossil fuels, thereby reducing carbon emissions. In the steel industry, as mentioned above, green hydrogen can be used to replace coal - based reducing agents for steelmaking, achieving low - carbon or even zero - carbon steel production. In addition, green hydrogen can also be used in some high - temperature industrial processes, such as glass manufacturing and cement production, to provide heat and reducing atmosphere, helping these industries reduce carbon emissions and move towards a green development path.