Do NOT introduce business class with free middle Seat instead of SAS plus service. This is a mile step backwards as planes take fewer passengers.

Discount on available seats if booked 5 hours before departure to fill up empty seats

Magazines and security and safety papers, is put on the sas app or screen only for long hauls to save paper

In M class on Intercontinental flights reduce the usage of plastics, ask the passenger to keep their glass for the entire flight before collecting it for recycling.

Offer pre-filled reusable water bottles and collect them in before landing

Mount small blades on the side of the wheels to make them spin by themselves before landing to reduce tyre wear upon contact with tarmac.