Re: Basic errors?

When pushing the blades in one direction, the air experiences an equal and opposite force - as described by Newton's laws, which could be called basic physics. So the air downwind of a rotating turbine will itself be rotating, causing the stirring mentioned in the article. When generating power, the more resistance put up by the turbine (i.e. the harder the wind has to work to turn the blades) the more stirring there will be.