The article discusses the potential of Hydrogen Internal Combustion Engines (H2-ICE) as a key player in decarbonizing the transport industry. H2-ICE is highlighted as a candidate to replace fossil fuels in internal combustion engines, offering advantages in parts commonality, familiarity, and performance attributes similar to diesel engines. The article mentions a webinar and white paper by the Engine Technology Forum that delve into the considerations related to H2-ICE, emphasizing the role of hydrogen in decarbonization. While acknowledging challenges such as NOx emissions and reliance on pilot fuel, the article suggests that advancements in aftertreatment systems can address these issues effectively. The cost and availability of green hydrogen, limited fueling stations for heavy trucks, and varying cost estimates for hydrogen production are identified as hurdles that need to be overcome. Despite these challenges, the article remains optimistic about the potential of H2-ICE engines to adapt to different hydrogen sources and play a crucial role in the transition to greener energy solutions.