Granting a number of KG per year per passenger for onboard / checked-in luggage

○○93♥Passengers can EuroBonus points by pre-booking sustainable airport transfer (train, public transport).

Finger food that's easy and clean to eat reduces the need for cutlery and packaging. That's less weight and packaging and opens up for fun, hearty snacks.

Dedicated recycling bins in galley/ head for passengers to use during non-service times

If you reduce the allowed weight for luggage from 23 kg to 15 kg or so, people might start to think if they really need all that stuff with them.

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.