Hydrogen is seen as a natural successor to the traditional fossil fuels – biomass, coal, oil and gas – that have dominated the world’s energy scene. The way in which it is produced is important in the context of climate change, and this suggests that electrolysis using low-carbon electricity may be the best option going forward. The possible emergence of the fabled ‘hydrogen economy’ then is linked to the rapid emergence of the renewable, and new nuclear technologies. This is energy’s dream team.