American Airlines has signed a conditional purchase agreement with ZeroAvia for 100 hydrogen-electric engines to power regional jet aircraft, with the aim of achieving zero inflight emissions except for water vapor. This agreement follows American's initial investment in ZeroAvia in 2022 and the company's participation in ZeroAvia's Series C financing round. ZeroAvia, a clean aviation innovator, is focusing on developing hydrogen-electric engines for commercial aircraft to minimize inflight emissions. The company is currently testing a prototype for a 20-seat plane and working on an engine suitable for larger aircraft like the Bombardier CRJ700. American Airlines' CEO, Robert Isom, emphasized the importance of investing in alternative propulsion technologies to advance the transition to a low-carbon aviation industry. The recent investment and engine purchase agreement contribute to American's ambitious target of achieving net-zero greenhouse gas emissions by 2050. ZeroAvia's hydrogen-electric engines operate by using hydrogen in fuel cells to produce electricity that powers electric motors driving the aircraft's propellers. This innovative technology results in minimal inflight emissions, primarily low-temperature water vapor, and offers the potential for considerable cost savings. The partnership between American Airlines and ZeroAvia showcases a commitment to sustainability and technological innovation in the aviation sector. American Airlines' continuous efforts towards fleet renewal and sustainability, including investments in sustainable aviation fuel and carbon removal processes, demonstrate a proactive approach to reducing environmental impact and promoting a cleaner future for air travel.