The amount of sky that you've given to the photo makes it work. The 2/3 of empty sky with the wind mills is a very appropriate crop here. I also like the texture the bottom 1/3 with the trees give's this image.
Jerry, I really like how the windmills "link" to the power lines here to demonstrate the conversion of energy. Well composed too. Nice how the windmills rise against the plain, white sky. In fact, I can imagine another crop that would completely eliminate the land and power lines to leave a simple white-on-white composition highlighting just the "windmill bouquet"; but either scene is quite wonderful. Good eye, Jerry...nice capture & photo! MFC