Stacks of Wood (IMAGE) Technical University of Munich (TUM) Caption Wood supplies become increasingly scarce when oil prices rise. Credit R. Rosin/TUM Usage Restrictions Free for use for coverage on Technische Universität München with the copyright mentioned. 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.