Sian Andrews, SESAR Environmental Lead at NATS, UK’s premier air traffic control provider, discusses vital aviation sustainability efforts. She reveals how contrails contribute significantly to climate change, often rivaling CO2 effects. The conversation dives into the CICONIA project aimed at contrail avoidance while optimizing fuel efficiency. Andrews also highlights the concept of ‘green route charging’ to steer airlines away from inefficient routes. Lastly, the Digital European Sky initiative promises a more sustainable future for air traffic management.