In informal talks at the 15th Annual Conference of the German Council for Sustainable Development on June 04th, 2015, the German Federal Association for Sustainability (GFAS) and the International Association for Sustainable Aviation (IASA) agreed on cooperation with respect to the joint promotion of holistic, sustainable efforts to improve the ecological balance in air traffic. This covers the whole field of civil aviation, such as airlines, aircraft manufacturers, airport operators/transport infrastructure and aviation-related products and materials.