In the face of growing concerns about climate change, aviation faces an existential crisis.The industry contributes three percent to global carbon emissions, and without significant changes, that figure could increase drastically as air traffic continues to grow. As world governments continue to roll out new environmental regulations, public opinion is up in the air about what role aviation should play in our society. To face these challenges, airlines are switching from fossil-fuel based kerosene to sustainable aviation fuel (SAF) in a push to lower emissions to net-zero, while electric and hydrogen-powered aircraft could make true zero aviation a reality in the coming decades. Even so, scaling these new technologies is extraordinarily complex, requiring major innovation in the air and on the ground. Fortunately, there are entrepreneurs, executives and investors facing these challenges head-on, charting a path for others to follow.Sustainability in the Air shares the journeys of these bold innovators to lay bare the innovations, insights and best practices of the next era of aviation. Complete with case studies and interviews with these changemakers, Sustainability in the Air teaches readers how: -Air Company made vodka from thin air to test technology for sustainable jet fuel-Archer Aviation plans to bring a futurist vision of urban air mobility to life with short-range electric aircraft (eVTOLs)-Heart Aerospace's innovative R&D, helped them design a new electric aircraft from scratch on a budget-ZeroAvia plans to enable hydrogen-powered flight for a true-zero future of aviation -Embraer will make regional flights sustainable with a new family of aircraftPlus, lessons from airline leaders at KLM, Etihad Airways, JetBlue, SkyTeam and more.The stories in Sustainability in the Air make it clear: to become truly sustainable, aviation must address investment, R&D, , logistics, regulation and culture problems-often all at once. While this transformation won't happen without a little turbulence, the industry has dozens of innovators who are working full throttle for a sustainable future.