San Bernardino, a city in Southern California, has introduced the first-ever hydrogen-powered passenger train, named Zemu, in the United States. The $20 million train utilizes a hybrid hydrogen fuel cell and battery system to operate on the Arrow Corridor, addressing the region's carbon neutrality goals and poor air quality issues. With the capacity to carry 108 seated passengers over a 9-mile route, Zemu offers a quieter and more environmentally friendly alternative to conventional trains. The project, overseen by the San Bernardino County Transit Authority and Swiss manufacturer Stadler Inc, is a significant step towards reducing emissions in the transportation sector. California's commitment to green initiatives is evident through plans to expand the hydrogen train network, with longer trains commissioned for routes between Merced and Sacramento. However, the high costs associated with hydrogen technology pose a challenge to widespread adoption, as industries require substantial investment for infrastructure upgrades. Despite the cost barriers, the introduction of Zemu showcases the potential for hydrogen-powered transportation and sets a precedent for other states to follow suit. While California leads in this transition, the need for scalable and cost-effective solutions remains a critical consideration for the future of hydrogen technology in the U.S. and beyond.