Serve sustainably grown coffee and tea on all flights from farms that are certified as carbon offset due to their farming practices

Eliminate single-use plastics and cardboard, use reusable porcelain, cutlery and glasses for on-board service instead.

Implement sharkskin technology or (my own) coating to reduce air resistance and micro-drag from the fuselage.

Urban farming/green house/open oasis at CPH. Be the first to serve “hub grown” veggies in the sky.

Implement biometric boarding and baggage tracking using facial recognition and RFID for faster boarding, reduced delays, and improved efficiency.

Using hydrogen tanks in the rear of the plane, for example. This could work on shorter routes such as domestic flights or intra-Europe.