Windpower is growing in popularity. Here is a commercial windfarm near McGrath, Alberta. This is smartly located in one of the windiest areas in North America, where Chinook winds can blow at 100 km/hour (60 miles/hour). But the windmills don't operate in winds that strong, and work best in the 20-40km/hr range. I buy all of my power from this windfarm (at 7 cents per kilowatt hour).
PP: Cropped into panorama, sharpened, resized, and framed.