American Airlines has announced a significant move towards reducing its carbon footprint by signing a conditional purchase agreement with ZeroAvia to acquire 100 hydrogen-electric engines for its fleet of regional airliners. The goal is to potentially retrofit CRJ700 aircraft with these engines, which operate by using hydrogen in fuel cells to produce electricity for conventional electric motors that drive propellers. American Airlines has also increased its investment in ZeroAvia, a European start-up pioneering hydrogen aviation technology, although the exact increment remains undisclosed. Currently, ZeroAvia is conducting flight tests on a 20-seat aircraft and is concurrently working on a larger system capable of powering aircraft like the CRJ700. American Airlines' CEO, Robert Isom, emphasized the importance of investing in innovative propulsion technologies to advance the transition of commercial aviation towards a low-carbon future. This strategic investment aligns with American Airlines' commitment to becoming a sustainable airline and its objective to achieve net-zero greenhouse gas emissions by 2050. The partnership between American Airlines and ZeroAvia signifies a step forward in the aviation industry's efforts to embrace sustainable practices and technologies. By leveraging hydrogen-electric propulsion systems, American Airlines aims to ensure a greener and more environmentally friendly operation, prioritizing the long-term sustainability of the airline while delivering exceptional service to its customers for years to come.