Untreated vs. treated forest (IMAGE) University of Washington Caption An aerial photo showing untreated forestland (left) across the road from an area that has been thinned (right). Credit John Marshall Photography 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.