Major manufacturers in the global trucking industry, such as Volvo and MAN, are exploring hydrogen combustion engines as a solution to reduce emissions amidst the energy transition challenges faced by the sector. While electric batteries present challenges for long-haul freight due to weight and charging times, hydrogen fuel cells offer extended range and reduced weight but require significant investment. Manufacturers like MAN and Volvo are focusing on hydrogen combustion engines, utilizing existing production lines to address these challenges. Despite facing technical issues such as harmful emissions and infrastructure hurdles like the limited availability of green hydrogen, industry players express confidence in the potential of hydrogen combustion technology. Companies like Cummins are working on market-ready hydrogen combustion engine models, aiming for a gradual transition towards lower emissions. This shift towards hydrogen combustion engines not only reflects a commitment to sustainability but also offers a pragmatic solution for manufacturers and fleet operators during the energy transition.