Oxygen is liberated from the water by electrolysis, and the hydrogen can be recycled back into the gas shift reaction, meaning that only a small amount of hydrogen is needed and can be brought from Earth.
Oxygen is liberated from the water by electrolysis. The hydrogen can be recycled back into the gas shift reaction. Only a small amount of hydrogen is needed. This was what the hydrogen was meaning. Only a small amount of hydrogen can be brought from Earth. This was what the hydrogen was meaning.