What the hell is ‘sustainable aviation’?
Airplanes that stay in the sky?
Battery planes with flapping wings, duh!
I am not an expert, but clearly it means the airplane doesn't fall out of the sky.
Sustainable aviation is a multi-disciplinary field that seeks solutions to improve the environmental and societal impacts of air transportation. It aims to reduce aviation’s contribution to climate change through new practices and radical innovation.
They are then using a 4 pillar strategy to achieve these goals; the four pillars are, new technology, more efficient operations, improved infrastructure and global market based measures for aviation emissions
https://forwardonclimate.org/popular-articles/what-are-the-4-pillars-of-aviation-sustainability/