A lot of ground equipment is still driven by internal combustion engines, and can be upgraded to run on electric instead for better efficiency.

I would use my skills in optimization and deep learning to learn what frequenzies and time schedules that maximizes the load factor of each aircraft in the fleet.

In small airports, like Vigra, where there only 1 or 2 airplanes stand, have roofs like carports to prevent snow on plane. This will reduce amount of deicing fluid needed.

Do not carry tax-free goods on flights. Use as online service and if necessary in partnership with partners allowing pick-up at airports.

For flights with a lot of empty seats, open more award seats short time before departure.

Use infrared heating to melt snow, ice, and frost without using chemicals