Swiss aviation pioneer Bertrand Piccard is spearheading the Climate Impulse project in Les Sables d'Olonne, France, aiming to revolutionize commercial air travel with a two-seater plane powered by green hydrogen. The project, backed by Airbus and other partners, plans a round-the-world trip in 2028 fueled by super-cold liquid hydrogen split from water molecules using renewable electricity. Despite challenges in scalability and untested innovations, the project has attracted significant investment and aims to set new standards for sustainable flight. The controlled release of liquid hydrogen from ultra-insulated tanks powers the plane through fuel cells, emitting only water vapor as the byproduct. The project faces technical challenges such as maintaining liquid hydrogen at ultra-low temperatures and ensuring efficient consumption over long distances. While the environmental impact of water vapor contrails remains uncertain, Climate Impulse represents a significant step towards reducing carbon emissions in aviation. By leveraging green hydrogen, the project not only aims to achieve a historic round-the-world flight but also to inspire the aviation industry towards more sustainable practices, potentially reshaping the future of air travel.