Offer an educational series during the flight about climate change and what passengers can do to help.

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.

Flying less emits less CO2. Thereby minimizing the impact on the planet.

Serve sustainably grown coffee and tea on all flights from farms that are certified as carbon offset due to their farming practices

Travelers register final destination, SAS sends taxi sharing offers via SAS transfer = lower taxi costs and individual receipts for passengers.

Travel light = bring less than 8 kg. If you do so, you should be rewarded with points. If not, SAS will use the extra money you have to pay for sustainability investments.