Present sustainability data for the flight in the infotainment system, with for instance bio-fuel stats, # meals pre-selected and how much carbon emissions was saved.

Stop giving away perks for children. They'll all end up in the garbage anyway.

Use more big size bottles and not small cans/bottles

Better food = less food waste. I see a lot of boxes not being emptied. So make sure it's good quality food to most peoples liking. Keep it simple and good

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.

Stop handing out plastic cups for canned drinks such as sodas, beer, and water. Unless the passenger asks for it. Reduces the number of unused cups that are thrown away.