Ridgetop wind farm (IMAGE) Iowa State University Caption Researchers took to the field to study icing on this ridgetop wind farm in eastern China. Credit Photo courtesy of Hui Hu/Iowa State University. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.