Swiss aviation pioneer Bertrand Piccard, renowned for Solar Impulse, is now spearheading the Climate Impulse project in Les Sables d'Olonne, France, to develop a two-seater plane powered by liquid hydrogen for a round-the-world journey in 2028. This ambitious endeavor aims to advance commercial aviation with green hydrogen produced through electrolysis. Despite the challenges of untested technologies and scalability issues, the project has attracted substantial investment and a growing team of experts. The plane's design includes ultra-insulated tanks releasing liquid hydrogen to power a fuel cell, emitting only water vapor as a byproduct. Progress so far involves cockpit and wing construction, with upcoming tests on propulsion systems and liquid hydrogen flow regulation. Liquid hydrogen, previously used in rocket propulsion, holds promise for reducing carbon emissions in aviation, aligning with industry goals for low-carbon aircraft by 2035. Though significant challenges lie ahead, including technology refinement and infrastructure development, experts believe in the potential of green hydrogen to transform air travel and mitigate environmental impacts.