Hydrogen is a major ingredient for many organic and non-organic chemicals, combining which fertilizers are produced.  About 55 % of the hydrogen, a fundamental building block for the manufacture of ammonia, produced around the world is used for ammonia synthesis, 25 % in refineries- where hydrogen is used for the processing of intermediate oil products, and about 10 % for methanol production.

From making types of polymers to desulfurization of hydrocarbons to produce sulfur-free fuels, a significant amount of hydrogen is used in chemical and fertilizer industries. Thus, supplying this magnitude of green hydrogen can significantly reduce the global carbon footprint.  Besides, chemical plants are also important for the production of green hydrogen as they can develop and lead the water electrolysis systems using renewable energies.