Forest Fire (IMAGE) University of Colorado at Boulder Caption The size and intensity of forest fires is directly linked to the density and flammability of houses in the wildland-urban interface, according to a new study involving CU-Boulder researchers. Photo courtesy USFS Credit U.S. Forest Service 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.