Truck manufacturers are aiming to shift away from old combustion engines in favor of cleaner technology, with a focus on hydrogen. The global freight industry, a major contributor to carbon pollution, especially through road transport, is recognizing the urgency to transition to cleaner energy sources. While electric batteries have limitations for long-haul trucking, hydrogen fuel cells are being explored as a more viable option. However, the high cost of producing green hydrogen poses a challenge, with 'gray hydrogen' from natural gas being a more common but less sustainable alternative. Despite this, industry experts see the potential for hydrogen combustion engines to become more prevalent once green hydrogen becomes more accessible. Efforts are underway to address the obstacles in adopting hydrogen technology, including the need for new truck designs to accommodate hydrogen fuel tanks. Various projects in the U.S., Europe, and Australia are working on improving the efficiency of green hydrogen production to make it a more feasible option for the freight industry. The environmental benefits of hydrogen, which only emits water vapor when burned, make it an attractive prospect for reducing carbon emissions and combating climate change. The ongoing advancements in green hydrogen technology offer hope for a cleaner future, where hydrogen could play a significant role in decarbonizing transportation and mitigating the environmental impact of the freight industry.