Hydrogen-burning internal combustion engines are emerging as a promising solution in the battle against climate change, offering a powerful, carbon-free alternative for heavy-duty trucks, buses, off-road equipment, and agricultural machinery. While hydrogen engines do not emit carbon, they produce nitrogen oxides during combustion, posing environmental challenges. Scientists at the University of California, Riverside (UCR) have introduced an innovative approach to address this issue by enhancing catalytic converters with Y zeolites. This solution significantly improves the conversion of nitrogen oxides into harmless gases, marking a crucial development in reducing pollutants from hydrogen engines. The research by UCR researchers, led by Professor Fudong Liu, demonstrates a substantial increase in the efficiency of catalytic converters, particularly at lower temperatures, making it a promising technology for reducing emissions during engine start-up. Moreover, the application of this technology extends beyond hydrogen engines to potentially decrease emissions in diesel engines incorporating hydrogen injection systems. This advancement represents a significant step towards cleaner and more sustainable combustion technologies, paving the way for a low-emission future in heavy-duty and industrial sectors.