What can we do about the noise pollution? Last time I was around a windmill the bigger one made an annoying woosh-whop noise and the small ones an annoying high pitched noise. Fixing the noise will help getting them accepted in more urban areas.
[1] "Noise Pollution Prevention in Wind Turbines: Status and Recent Advances", https://www.mdpi.com/2071-1050/4/6/1104
[2] "Reduction of Wind Turbine Noise Using Optimized Airfoils and Trailing-Edge Serrations", https://arc.aiaa.org/doi/abs/10.2514/1.38888
It is very pleasant to listen to (I know, because the huge yacht next to my little boat has one).