[FabHK]

The very short answer is that the wing pushes the air down, thus (by Newton's 3rd law) the air pushes the wing up.

[bandrami]

That's incomplete though; an asymmetric airfoil with 0° angle of attack does generate lift. The problem is the "equal times" -- the times are not "equal", but the air passing over the curved side does go faster.

[FabHK]

Sure. By deflecting the air down.

> Cambered airfoils generate lift at zero angle of attack. When the chord line is horizontal, the trailing edge has a downward direction and since the air follows the trailing edge it is deflected downward.

[bandrami]

But the air on the leading edge is deflected upwards when it hits