Wind turbines are the subject of this week's energy-efficient free image. How can an image be energy-efficient, you ask? Easy. It downloads in seconds with the click of a button, and costs you nothing. Ta dah! This week's free image comes to us from contributor Batareykin, from a colorful collection that includes boots, boxers, and sailboats!
For more images like this one, check out our entire collection of energy conservation photos. Happy Downloading!