Sometimes it is more windy around the corner. I think it’s called Bernoulli’s equation and it explains why birds and planes can fly. I’m not an airline pilot, though, just trying to explain a breaking idea.
Søren Bang-Møller from Denmark has just patented a product, that can produce energy by catching the wind around the corner. The wind very close to your house or roof, where you can’t place a wind turbine. Sometime in the fall he will display it. Look after the Wind Ridge Turbine (in Danish).