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hydrogen is the most abundant of all elements
The hydrogen [[economy]] is a term for a economic system in which [[hydrogen]] is used to store [[energy]]. Burning [[hydrogen]], a chemical compound (H<sub>2</sub>) could be used in [[fuel cell]]s to produce energy without [[carbon dioxide]] emissions. Instead, [[water]] would be produced.
The hydrogen [[economy]] is a term for a economic system in which [[hydrogen]] is used to store [[energy]]. Burning [[hydrogen]], a chemical compound (H<sub>2</sub>) could be used in [[fuel cell]]s to produce energy without [[carbon dioxide]] emissions. Instead, [[water]] would be produced.
Hydrogen is found in stars and is a volatile gas on [[earth]].
Hydrogen, which is the most abundant of all elements, is found in stars and is a volatile gas on [[earth]].
[[Category:ecology]]
[[Category:ecology]]