Building more aerodynamic aircraft and operating them more efficiently (by reducing air-traffic-control delays, for instance) could produce about two-thirds of those savings.

制造更符合空气动力学的飞机，并用更有效的方式来运营飞机——例如减少空中交通控制而产生的延误，这些方法可以为这些节省做出大约三分之二的贡献。