Bertrand Piccard, known for Solar Impulse, is now leading the Climate Impulse project in Les Sables d'Olonne, France, aiming to pioneer green commercial flight using liquid hydrogen split from water molecules through electrolysis. The project, backed by Airbus and others, targets a nine-day round-the-world trip in 2028 with a two-seater plane fueled by green hydrogen. While the project has attracted significant investments and a growing team, challenges lie ahead in innovation and scalability. The use of liquid hydrogen for aviation, if successful, could significantly reduce carbon emissions, but scaling up remains a long-term goal. Progress includes building the cockpit shell and wing spar, with upcoming tests on fuel cells and propulsion systems. Liquid hydrogen poses challenges in maintenance and safety due to its extremely low temperature and flammability. Despite the hurdles, experts see the potential of green hydrogen to revolutionize aviation, aiming to cut carbon dioxide emissions in half. The project faces the task of regulating liquid hydrogen flow for efficient consumption over long ranges, among other technical challenges. While still years away from commercial viability, the Climate Impulse project represents a bold step towards a greener future in air travel.