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

Better food = less food waste. I see a lot of boxes not being emptied. So make sure it's good quality food to most peoples liking. Keep it simple and good

Pay for luggage by weight.

Include 1 free unit of biofuel per booked flight, for passengers that have reached Conscious Traveller status.

Develop lightweight, recyclable cabin materials and onboard items to reduce aircraft weight and waste.