Clouds forming in the wakes of the front row of wind turbines of Horns Rev wind farm. The downstream wind turbines lose 20% or 30% of their power, and sometimes even more, relative to the front row. The spacing of the turbines is 7 diameters. (via Sustainable Energy - without the hot air: Wind farm wakes )

Clouds forming in the wakes of the front row of wind turbines of Horns Rev wind farm.

The downstream wind turbines lose 20% or 30% of their power, and sometimes even more, relative to the front row. The spacing of the turbines is 7 diameters.

(via Sustainable Energy - without the hot air: Wind farm wakes

)