skos:definition An application of hydrogen in the chemical @en
                  vocabulary.dcterms:description  structure of hydrogen-based markets. HOLY contributes to, the systemic modeling of the hydrogen domain with a, foundation for retrieval, storage, and delivery of market insights. @en
                  rdfs:comment Hydrogen is one of the key starting materials, building block for the manufacturing of ammonia,, fertilizers, and  methanol, which is used in the manufacture of many polymers. @en