Keep a updated and modern fleet of aircrafts.

Give/sell digital bag tags to frequent flyers

Allow users to visualise their travel carbon footprint in-app. Include everything such as transportation to/from the home and destination, hotels.

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

Develop solar-powered aircraft with energy storage systems to enable fully renewable, zero-emission long-haul flights within the next decade.

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