The European Commission has launched the Alliance for Zero Emission Aviation, calling on the members of the aviation community to join forces in preparing for the advent of zero emission aircraft. The Alliance for Zero Emission Aviation aims to prepare the aviation ecosystem for the entry into service of hydrogen- and electric-powered aircraft, to ensure that air transport contributes to Europe's 2050 climate neutrality objective. It will gather representatives of aircraft manufacturers, airlines, airports, energy companies and fuel providers, standardisation and certification agencies, passenger and environmental interest groups and regulators.They will jointly work to identify all barriers to the entry into commercial service of these aircraft, establish recommendations and a roadmap to address them, promote investment projects and create synergies and momentum amongst members. In particular, the members will look at issues such as the fuel and infrastructure requirements of hydrogen and electric aircraft at airports, standardisation and certification, and the implications for operators (airlines) and air traffic management.Over the next two decades, more than 44,000 new aircraft are expected to be placed on the market. The potential market volume for zero emission aircraft has been estimated at 26,000 by 2050, with a total value of EUR 5 trillion.The Alliance will eventually deliver on the commitment to align the sector with the EU's climate ambition, goals and other related policies. The international dimension of the sector is also a major element, as tackling climate change is a global effort.