Enable paid upgrades to Bio tickets online after agency/company booking is made, so employees can override restrictive company policies and gain more level points

Include meal information as early as possible in-app.
This is good for people with allergies, so they abstain from it.

Complimentary Arlanda Express ticket when booking a flight to/from Stockholm

Have a separate bin to put old baggage tags and recycle them. Not together with ordinary waste.

Reduce taxi time,(for larger aircraft) continuous climb and decent, optimized flightpaths, implement greener lounges (green electric), more points for greener choices.

On your flights, start sharing how much of that flight is powered by biofuel purchased by customers flying.