Portrait Stefan Spirk (IMAGE) Graz University of Technology Caption Stefan Spirk wants to replace environmentally harmful components with bio-based materials, primarily substances from the paper and pulp industry. Credit © Lunghammer - TU Graz 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.