An apparatus for diverting, revectoring and accelerating a mass of gas, for example, a rapidly moving air mass traversing the landscape, wherein the apparatus comprises first and second spaced-apart upstanding walls, the first wall being disposed relative to the second wall such that the lower terminus of the first wall is disposed above the lower terminus of the second wall, thereby forming an entry inlet for high velocity air mass to pass between the walls and exit at the other end; the walls are disposed in a convergent rotation in the direction of the exit outlet of the apparatus and further, the upper terminus of the second wall being positioned relative to the upper terminus of the first wall such that an air mass flowing through the space between the first and second walls will exit the apparatus at an accelerated flow rate relative to the entry flow rate and with a vector divergent from the flow vector at the entry inlet and the walls being disposed.