Bertrand Piccard, well-known for his Solar Impulse project, is now leading the Climate Impulse initiative in Les Sables d’Olonne, France, with the goal of pioneering greener commercial flight through the use of super-cooled liquid hydrogen. Unlike the solar-powered flight a decade ago, which was more of a symbolic feat, Climate Impulse aims to make a tangible impact on air travel sustainability. The project plans to conduct test flights next year and embark on a challenging nonstop global journey fueled by green hydrogen in 2028. While the project has attracted significant investment and a growing team, experts caution that widespread implementation of green hydrogen for commercial flights is a distant prospect. The development and scalability of liquid hydrogen technology pose significant challenges, with fossil fuels currently dominating hydrogen production due to cost and efficiency factors. Despite the environmental benefits of using hydrogen as fuel, questions remain about the impact of water-vapor emissions from such flights. Climate Impulse's innovative approach involves controlled hydrogen release under the plane's wings, powering a fuel cell that propels the aircraft without harmful emissions. The project's success could pave the way for cleaner air travel, addressing a small but significant portion of global carbon emissions from the aviation sector. While the journey towards sustainable hydrogen-powered flights may be long, projects like Climate Impulse play a crucial role in pushing the boundaries of green aviation technology.