Swiss aviation pioneer Bertrand Piccard, famous for the Solar Impulse project, is now spearheading the Climate Impulse project in Les Sables d'Olonne, France, with the aim of revolutionizing air travel through green hydrogen-powered flight. The project, backed by partners like Airbus and Syensqo, focuses on flying a two-seater plane around the world nonstop over nine days using green hydrogen produced through electrolysis. While the project has ambitious goals for a 2028 round-the-world trip, it faces challenges due to untested innovations. Piccard emphasizes the importance of pioneering such projects to inspire the aviation industry towards greener alternatives. Despite the potential success of Climate Impulse, experts caution that widespread adoption of green hydrogen-powered flight is still far off. The project's reliance on green hydrogen, which only emits water vapor, aligns with global efforts to reduce carbon emissions from air travel. The Climate Impulse team has made progress over the past year, constructing essential components like the cockpit shell and interior features. Tests are underway for the fuel cells and propulsion systems, critical for the plane's fully-electric flight phase. Managing the flow of liquid hydrogen efficiently and maintaining it at extremely low temperatures pose significant challenges. Liquid hydrogen, though mainly used for rocket propulsion, holds promise for aviation's transition to more sustainable practices. While the road to commercial-scale green hydrogen flight is long, projects like Climate Impulse represent crucial steps towards a greener future for air travel. The aviation industry's growing carbon emissions highlight the urgency of developing eco-friendly solutions, with hydrogen emerging as a potentially transformative technology in this regard.