Wood Skylight Graphic (IMAGE) University of Maryland Caption This is a wood composite as an energy efficient building material: Guided sunlight transmission and effective thermal insulation. Credit University of Maryland and Advanced Energy Materials Usage Restrictions Credit as shown 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.