In the app, the PAX can choose what they don't want/need from what is included in their ticket. No checked-in luggage get EB points. No meal, no headphones, no kit +++.

Incentivize sustainable behavior, e.g. a small reward for bringing your own coffee cup. This can also be sold by SAS in the Eurobonus store or in flight.

Change the paper dispensers in the lavatories, often many tissues come at a time. Get single tissue dispensers. Save paper and avoid overfilled bins that looks untidy.

Stop Printing menus for biz class, make them available on the monitor.

Present sustainability data for the flight in the infotainment system, with for instance bio-fuel stats, # meals pre-selected and how much carbon emissions was saved.

Stop handing out plastic cups for canned drinks such as sodas, beer, and water. Unless the passenger asks for it. Reduces the number of unused cups that are thrown away.