Do not introduce Business class on intra-european flights. Plus is fair enough and very valuable for short flights and have a human price (like Norwegian and Ryanair).

Introduce an option during the booking process for passengers to offset their carbon footprint by contributing to environmental projects, with SAS matching portion of it.

More efficient and simple airports generates lower airport taxes. Upside, overall cost WITH Biofuel ticketing acceptable.

Earn EuroBonus points when recycling. Collaborate with apps such as Bower and Repeat in Sweden. They offer cash rewards for recycling. Why not reward points instead!

In Plus and Business on long haul - hand out amenity kits by request instead of placing them on all seats.

Establish additional partnerships with other airlines on specific routes to, for example, consolidate two half-full flights into one fully-booked flight.