Produced by electrolysis of water but with electricity generated by nuclear power plants.
Produced by electrolysis of water with electricity from recyclable sources.
Produced by methane reforming with CO2 sequestration.
Produced by electrolysis of water with electricity from fossil sources (coal-fired power plants, etc.)
It is obtained from methane (CH4 molecule) very rich in hydrogen, through a chemical reaction (reforming). Releases CO2