San Bernardino, in Southern California, has introduced the first hydrogen-powered passenger train in the United States, named Zemu. This $20 million train utilizes a hybrid hydrogen fuel cell and battery system to operate the lightweight vehicle, carrying 108 seated passengers along the 9-mile Arrow Corridor. The initiative is a vital step towards California's 2045 carbon neutrality goals, targeting the improvement of air quality in a region known for its high pollution levels. Zemu, designed to run quieter than traditional trains, combines hydrogen and oxygen to generate electricity and water vapor, promoting a zero-emission transport alternative. The project aims to comply with Federal Railroad Administration requirements by 2025, setting a precedent for sustainable transportation in North America. Moreover, California plans to expand its hydrogen train network by ordering additional units from Stadler for routes connecting Merced and Sacramento. Despite these advancements, the U.S. faces challenges due to the high costs associated with hydrogen technologies. Industries hesitate to invest in hydrogen due to the need for costly infrastructure changes, hindering widespread adoption. The article emphasizes the economic obstacles in transitioning to hydrogen, noting the significantly higher costs of green hydrogen production compared to traditional methods. The industry's reluctance to invest without assured demand highlights the complexities of developing hydrogen infrastructure. As the world seeks greener energy solutions, the article underscores the current financial barriers and uncertainties hindering the rapid transition to hydrogen technology.