Aviation emissions are usually seen as a technological issue; more efficient planes, better (sustainable) aviation fuel etc is the answer..... but what if organisational issues would make a more immediate impact:

reduce the number of semi-filled/empty flights (require all flights to be full to at least more fully booked);

reduce or even abolish business class, both expanding passenger numbers per flight (less flights) & putting off business travellers.

#emissions
https://theconversation.com/scrapping-business-class-could-halve-aviation-emissions-new-study-275474