Changing heating method for flight meals from conventional owens to special adapted microwave owens exclusively intended for the aviation industry to save energy.

Even if you have a few seats in business. The planes will be filled as usual while providing better service with almost no additional carbon footprint.

Not handing out napkins under every drink.

Ensure correct recycling of plastics by unwrapping meals and plastic protected crisp breads before handing to the customer.

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

Use larger packages for the most consumed drinks, instead of handing out endless amounts of cans (less garbage, less weight on board) .