Keep the temperature at decent levels instead of heating too much in air.

Include a minimum of 50% bio-fuel for all SAS Business seats. Market it as a part of business being reintroduced in Europe. A win-win, for both customers and airline.

Keep your good clients - minimum 10 years as gold member gives you gold for life. Not necessarily 10 years in a row. Now 18 years with 1 missing in the middle = no go

Issue extra bonus and level points to passengers who decide opt out of their included meal ahead of a flight.

Introduce a "minimal comfort" seating class with basic amenities and reduced seat recline, allowing more passengers per flight and lowering per-person emissions.

For flights with a lot of empty seats, open more award seats short time before departure.