Hydrogen is a volatile gas with an image problem, but hydrogen evangelists think this could be the ‘magic molecule’ which will solve the world’s air pollution and cut carbon emissions dramatically. Manuela Saragosa presents the final part of this special series on energy from Italy, where hydrogen has been pumped into the existing gas network. Could a hydrogen boat replace the diesel belching cruise liners and ships along the canals of Venice?

Presenter: Manuela Saragosa
Producer: Nina Robinson

Photo Credit: Nina Robinson/BBC