A moment of unprecedented momentum for hydrogen Interest in hydrogen’s potential as a widespread, low-carbon energy carrier is not new. Over recent decades a wide range of experts has researched the potential for producing hydrogen from diverse sources, transporting and storing it, and using it to provide final energy services without emissions. The two previous major cycles of enthusiasm for hydrogen focused largely on the use of fuel cells in the transport sector. What is new today is both the breadth of possibilities for hydrogen use being discussed and the depth of political enthusiasm for those possibilities around the world. […]