Sometimes we don't need the cream and toothbrush; sometimes a pair of socks is sufficient. Being able to customize the amenity kits in advance reduces waste.

Develop lightweight, recyclable cabin materials and onboard items to reduce aircraft weight and waste.

SAS should encourage the last lounge guests to take leftover food, minimizing waste and promoting sustainability in their lounges.

a better airline trolley for sorting garbage. Maybe with possibility for travellers to put in from the sides.

Make a “code-share” cooperation with train providers, to allow for booking a ticket from A to B with combined train-plane modality and same benefits as connecting flight

Reusable coffee cups for take away coffee and in-flight.