የአሜሪካ የኢነርጂ መምሪያ እንዳመለከተው ሃይድሮጂን ብዙውን ጊዜ "በተፈጥሮው በራሱ አይኖርም" ስለሆነም በውስጡ ካለው ውህዶች የሚመነጭ ነው ።
As the U.S. Department of Energy has noted, hydrogen does not usually "exist by itself in nature" and needs to be generated from compounds containing it.