Governments and private companies worldwide are focusing on decarbonising transport, leading to the deployment of innovative passenger train technologies across different countries. Recently, the world saw the launch of the first carbon fiber metro train in Qingdao, China. The Cetrovo 1.0 Carbon Star Express, made primarily of carbon fiber, is lighter and more energy-efficient than traditional trains, showcasing advancements in materials and design for sustainable transport solutions. Similarly, Italy's IronLev conducted successful tests of a maglev train prototype on existing rail infrastructure, demonstrating the potential to reduce costs and energy consumption in rail transport. The unique maglev technology uses air cushion to separate the train from the track, reducing friction and energy demand. The U.S. also made strides in sustainable transportation by introducing its first zero-emission passenger train powered by hydrogen fuel cells. The Zero Emission Multiple Unit (ZEMU) in San Bernardino, California, sets a precedent for environmentally friendly rail travel in North America. With countries like Germany, the U.K., and France also venturing into hydrogen-powered trains, there is a global shift towards exploring cleaner alternatives for passenger train travel. These advancements signal a positive outlook for the future of decarbonising transportation through a combination of innovative technologies and sustainable practices.