Beautiful - dark and brooding, with the windmills facing right up to the edge, yet all that light on the horizon and by the clouds. Great study in shapes. It's not b/w, it is? It almost looks b/w, but I can see yellows and mauves and pinks. I think this might be my favourite of the challenge (but I'm not done looking).
Awesome leading lines that draw you into this shot. I love the conflict between dark and light, symbolizing man's industrial conflict with nature. Your choice to photograph alternative energy sources adds to this shot by suggesting a more environmentally sound solution to our needs. WHEW! That was a mouthful! Great job and congratulations on a beautiful capture. 10 from me.
7 - Good concept and perspective. Criticism; difficult, as you were likely going for such 'darkness', but in my opinion a little more 'balance', and/or color/toning and detail, would have made this even better. The 'grain' works, but perhaps if it were either enhanced to make it more dominant, or the whole shot softened, not sure, just seems to be hovering in the middle, yet still noticeable, if that makes sense. edit:typos