American Airlines has taken a significant step towards sustainable aviation by making a conditional commitment for 100 zero emissions hydrogen aero engines from ZeroAvia. These engines are intended to power a future regional aircraft that is designed to have zero carbon emissions, marking a major leap towards environmentally friendly air travel. In addition to this engine deal, American Airlines has increased its funding of ZeroAvia as part of a round of Series C funding to further develop hydrogen-electric fuel cell technology. ZeroAvia is currently in the testing phase of a hydrogen-electric engine for a 20-seat regional jet, with plans to scale up this technology for larger aircraft in the future. Both companies have expressed enthusiasm for the potential of hydrogen-electric propulsion to revolutionize the aviation industry and contribute to a cleaner future. American Airlines' CEO, Robert Isom, emphasized the importance of investing in promising technologies like hydrogen propulsion to make the airline more sustainable and customer-centric in the long term. ZeroAvia's Founder and CEO, Val Miftakhov, sees American's commitment as a positive signal for the advancement of clean aircraft propulsion technology, indicating that the transition to a low-carbon future of flight is within reach. The hydrogen-electric engines developed by ZeroAvia utilize fuel cells to generate electricity from hydrogen, resulting in only low-temperature water vapor as the inflight emission. This collaboration between American Airlines and ZeroAvia signifies a significant milestone in the journey towards a more sustainable and environmentally friendly aviation industry.