brown hydrogen

[ broun hahy-druh-juhn ]

noun

1. hydrogen that is produced by breaking down coal, especially lignite, with steam and oxygen, releasing high amounts of carbon into the atmosphere. Compare black hydrogen ( def ).

Word History and Origins

Origin of brown hydrogen¹

First recorded in 2005–10

Example Sentences

Hydrogen made using coal power is often called “black” or “brown” hydrogen.

From NewsForKids.net