Wind power has all the ingredients of a good brain-buster. The energy that windmills produce helps to preserve the environment, but the giant wind generators themselves have to be added to the environment. Wind power is making us redefine what we consider pollution. Windmills may not billow black smoke that requires scrubbing or leak hazardous radiation, but they make a lot of noise and can change a scenic horizon or ridgeline into a jumble of tinker-toy technology. Like dams in rivers, they interrupt the free flow of natural settings.