Bertrand Piccard, known for Solar Impulse, is leading Climate Impulse to explore greener air travel using liquid hydrogen. The project, backed by Airbus and others, aims to fly a two-seater plane round-the-world nonstop using green hydrogen produced through electrolysis. Progress includes building the cockpit and finalizing interior components, but major challenges lie ahead, like regulating liquid hydrogen flow and ensuring safe storage due to its flammability. Despite the optimism, experts caution about the environmental impact of water-vapor contrails and the long timeline for commercial implementation. Airbus sees hydrogen as crucial for low-carbon planes by 2035, but hurdles remain, such as weight constraints and the complexity of using super-cold liquid hydrogen safely. Overall, Climate Impulse presents a positive step towards sustainable aviation, though significant technological advancements and regulatory changes are necessary for its widespread adoption.