Guarding the grid (IMAGE) Iowa State University Caption Researchers are working to protect power grids that include renewable resources such as wind or solar farms. These Central Iowa Power Cooperative transmission lines are near Orient, Iowa. Credit Photo by Zach Finn, Digital Communications Specialist, Central Iowa Power Cooperative. Usage Restrictions None License Original 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.