Free reebooking to earlier flight when avilable. Result in filling up seats, and making it more likely to fill up seats on later flights

In order to maximum cabin factor, offer Eurobonus tickets on all flights

Develop incentive programs for staff to contribute ideas on reducing emissions. Make staff applicable for perks by doing "missions".

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

Offer an educational series during the flight about climate change and what passengers can do to help.

Award additional EuroBonus bonus and/or level points when renting an electric vehicle through a car rental partner such as Hertz, Avis or Sixt.