Introduce a "minimal comfort" seating class with basic amenities and reduced seat recline, allowing more passengers per flight and lowering per-person emissions.

Flying less emits less CO2. Thereby minimizing the impact on the planet.

Currently, biofuel is an opt-in option. By having a certain share of biofuel by default and rather "forcing" the customer to opt out, more customers will buy biofuel.

Allow free rebooking on the day of departure to a shorter route or a route with less stops when available, even in low booking classes and without status.

Engage travellers actively through the app: compete to save energy related to travel (pack light, public transport, direct flights) & display flight energy-consumption

Use travellers feces from flights as a bioproduct. As fuel or to something else useful.