Potential Wind Power is optimal at heights of 50-80 m through mills. The strong wind is highly concentrated in an area east of the Rocky Mountains.
Windmills of Banning Pass, near Palm Springs, California, United States (N 33°57' W 116°42')
Source: http://www.yannarthusbertrand.org/en/home from Earth from Above by the incomparable photographer Yann Arthus-Bertrand
