Hydrogen is promoted as a key component in energy transition, providing a carbon-free source of energy from transportation to heating our homes, while conveniently using existing oil & gas infrastructure and reserves. If so, why haven’t we built a hydrogen economy already? Is the hydrogen economy more hype than hope? What are its challenges from the immutable laws of thermodynamics, to technology, to safety and cost that have limited it to date? And as the commodity community begins to focus on it, what questions need to be asked. Our guest is Paul Martin, a chemical process engineer with a long association with hydrogen and its uses. Paul, a well-known thinker and writer on energy transition, walks us through the science and why hydrogen might continue to play a minimal, even negative, role in the energy transition story.