The United States has marked a significant milestone in the decarbonization of public transport by launching its first hydrogen-powered passenger train, the Zero Emission Multiple Unit (ZEMU), in San Bernardino, California. The ZEMU, capable of carrying 108 passengers, is set to enter full service in early 2025, providing a real-world application of hydrogen technology in everyday public transport. While the US is at the initial stages of its hydrogen train journey, other countries have already made progress in this area. The article discusses the advantages and challenges of hydrogen and electric technologies in rail transport. Both are essential for achieving net-zero emissions in the industry. Electric trains, while emissions-free at the point of use, require expensive infrastructure and rely on external power sources, potentially adding to overall carbon emissions if not sourced from renewables. On the other hand, hydrogen trains offer benefits like higher energy content and lower upfront infrastructure costs, although they require extensive infrastructure development due to the volatile nature of hydrogen. The successful implementation of hydrogen trains hinges on developments in green hydrogen production and supporting infrastructure, with the potential for increased deployment globally as technology advances and economies of scale come into play. The choice between hydrogen and electric trains will likely depend on various factors like route requirements, existing infrastructure, energy production methods, and cost projections. The article also highlights the importance of a combined approach using both technologies to achieve a fully decarbonized rail network. The World Economic Forum's Advanced Energy Solutions community is actively working to accelerate the deployment of advanced technologies like clean fuels, hydrogen, advanced nuclear, energy storage, and carbon removal. By engaging leaders in key energy sectors, the community aims to reduce the transition timeline from decades to years, playing a crucial role in driving the global push towards sustainability and decarbonization.