The most plentiful element in the Universe happens to make great rocket fuel.

Hydrogen is used as fuel for fusion power generators found in space-faring vehicles and spacecraft. Hydrogen power plant also uses hydrogen to produce electricity.

Hydrogen can also be used as a shortcut to produce water and fertilizer at a refinery.

Produced by

Building	Produces	Consumed	Required	Optional
Refinery	10 Hydrogen		Atmosphere Density Electricity	Computer (+ output)
Refinery	10 Hydrogen	10 Natural Gas	Electricity	Computer (+ output)
Refinery	10 Hydrogen	20 Water	Electricity	Computer (+ output)

Production uses

Building	Produces	Consumed	Required	Optional
Refinery	10 Fertilizer	10 Air 10 Hydrogen		Computer (+ output) Electricity (- time)
Refinery	10 Fertilizer	10 Hydrogen	Atmosphere Density	Computer (+ output) Electricity (- time)
Hydrogen Power Plant	600 Electricity	10 Hydrogen	Fitting Wrench	Computer (+ output)
Refinery	10 Water	10 Air 10 Hydrogen	Electricity	Computer (+ output)