Trees Obstructing the View in a Portland, Ore., Neighborhood (image) USDA Forest Service - Pacific Northwest Research Station Share Print E-Mail Caption Smaller trees can block views from homes, making it more difficult to observe criminals. Shown here is a neighborhood in Portland, Ore., where a study was conducted that explored the effects of trees and other factors on crime occurrence in the city. Credit Geoffrey Donovan, U.S. Forest Service, PNW Research Station Usage Restrictions None Share Print E-Mail 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.