The global push for net zero carbon emissions is one of humanity's greatest challenges. In this film, the FT's Simon Mundy explores how hydrogen - the lightest, most abundant element in the universe - could play a crucial role. From southern Spain to Swedish Lapland, we meet those at the forefront of this fast-growing space - all seeking a share of the billions to be made in the emerging hydrogen economy. #hydrogen #greenhydrogen #EmeraldHydrogen #steel #hydrogeneconomy #zerocarbon #emission 00:00 What is Hydrogen 00:50 Green Hydrogen 02:50 Current uses of hydrogen 04:10 The concerns 05:00 The Hydrogen rainbow 05:51 Emerald Hydrogen 07.35 The investors 10:50 The policymakers 13:40 Green steel 17:35 Cleaning up aviation 22:15 The hydrogen economy of the future See if you get the FT for free as a student (http://ft.com/schoolsarefree) or start a £1 trial: https://subs.ft.com/spa3_trial?segmentId=3d4ba81b-96bb-cef0-9ece-29efd6ef2132. ► Check out our Community tab for more stories on the economy. ► Listen to our podcasts: https://www.ft.com/podcasts ► Follow us on Instagram: https://www.instagram.com/financialtimes'