Jennifer Russell (IMAGE) Virginia Tech Caption Sustainable Biomaterials Assistant Professor Jennifer Russell, who is working to develop a circular economy for polyurethane foams, holds an athletic shoe made with upcycled waste materials. Credit Clark Dehart for Virginia Tech Usage Restrictions No restrictions. License Public Domain 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.