Global emissions from air traffic can be reduced by up to 50–75% by using aircraft more intelligently by flying with the most fuel-efficient aircraft, prioritizing economy class over premium classes, and filling planes more efficiently. Simply by using the most efficient aircraft already in the airlines’ fleets, emissions could be reduced by around 11 per cent immediately.
lnu.se/en/meet-linnaeus-university/current/news/2026/aviation-emissions-can-be-halved–with-measures-that-already-exist/