A groundbreaking ZEMU train in Los Angeles County is heralding a shift towards sustainable public transportation by utilizing hydrogen fuel cells to power itself, reducing both local and global smog. The train, set to begin routine service from San Bernadino to Los Angeles, offers a green alternative to traditional heavy fuels. Unlike electric trains that rely on overhead powerlines, ZEMU trains do not require costly infrastructure investments, making them a more practical choice for decarbonization efforts. Manufactured by Stadler, these trains convert hydrogen fuel into energy for electric batteries, with water vapor as the only emission. Despite the current use of fossil fuel-derived hydrogen, plans are in place to transition to green hydrogen in the future. This initiative aligns with the urgent need for zero-emissions transport in San Bernadino, a city grappling with poor air quality and high smog levels. The innovative approach of the ZEMU train showcases the potential of hydrogen-powered transportation to drive environmental sustainability and combat climate change.