Hydrogen

Hydrogen is a versatile energy carrier that can be produced from any fossil or nonfossil primary energy source. It can be converted into mechanical energy in combustion engines and into power using so-called “fuel cells,”, but the business case has not been widely spread yet. Although (fossil) hydrogen was already applied in some plane flights, technical issues like on-board storage still have to be solved. Technologies are still in their early days of reducing costs— even more if combined with renewable sources—and overcoming technical barriers.