Reusable boarding cards for people without phones. Like the consius travelee bag tag.

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

Automatic opening of trash-lid on planes with hand gesture above it. Saves excess use of papertowels and bonus: increases hygiene and bacteria spread

Free coffee only for those who have reusable cups with them. Fee for paper cup or no paper cups at all.

Reusable coffee cups for take away coffee and in-flight.

Always aim for fully booked flights; if not, find the best solution to optimize occupancy and efficiency.