Veggie first airline should be implemented. Not only for Sustainability reason, also to meet the modern traveler expectations

Tell the story on-board in the IFE to attract more companies that want to get involved and contribute!

Discount on available seats if booked 5 hours before departure to fill up empty seats

Let the captain thank the x number of passenger on board that added bio-fuel on the ticket.

Bio fuel / green fuel as default, and having to pay more as a passenger if you want to fly on fossil based airplane fuel.

Let's start by using SAF at least for domestic flights.