By reducing the time planes spend with engines idling on the ground, we can decrease fuel consumption and emissions.

If biofuel could be bought/added with points, people could spend their "soon-to-be-expired" points on biofuel rather than something unsustainable.

Almost all passengers have their own phones/pads these days. Keep them connected with *good* wifi and IFE wont be needed, massive weight savings.

Create an ability to share a seat in your car with other passengers on the flight. It's better than everyone riding their car.

Reduce taxi time,(for larger aircraft) continuous climb and decent, optimized flightpaths, implement greener lounges (green electric), more points for greener choices.

Option to sort by emission when booking flights