The Southwest Texas Research Institute in San Antonio has successfully developed a hydrogen internal combustion engine for a commercial truck, demonstrating a carbon-free and environmentally friendly solution. Despite the technological advancement, challenges persist in expanding hydrogen infrastructure, particularly in the storage and safety aspects, alongside limited government backing. The institute's hydrogen-powered semi-truck, equipped with a converted combustion engine, symbolizes a step towards reducing transportation-related emissions. However, the lack of hydrogen refueling stations across the U.S. poses a hurdle for widespread adoption. Texas, a prominent energy hub, aims to spearhead a hydrogen revolution with SwRI's cutting-edge technology. To address infrastructure gaps, SwRI initiated the H2-ICE consortium, collaborating with industry stakeholders to develop a low-emission hydrogen engine for heavy-duty vehicles. The project aligns with stringent environmental standards and aims to promote hydrogen alongside other zero-emission technologies. SwRI's commitment to innovation led to the successful conversion of a natural gas engine to run on hydrogen, showcasing its potential for emissions reduction. The institute also launched the H2HD REFUEL consortium to improve refueling technologies and attract commercial partners for further advancements. While the hydrogen truck signifies a promising future for green transportation, widespread adoption hinges on policy support and enhanced infrastructure. SwRI's endeavors to educate both the public and policymakers about the benefits of hydrogen engines highlight the institute's dedication to sustainable energy solutions.