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If hydrogen could be used in cars, it would be important in establishing the [[hydrogen economy]].
If hydrogen could be used in cars, it would be important in establishing the [[hydrogen economy]].
==Compounds==
Hydrogen can be found in both [[organic]] and [[inorganic]] compounds (for example, [[hydrocarbon]]s and metal hydrides, respectively. Scientists have determined that hydrogen is the most common element in the universe. It is an important component of [[water]].
[[Category: Elements]]
[[Category: Elements]]