COLUMBUS, Ohio, May 6 -- Ohio State University posted the following news: * * * How trees in urban areas are key to cooling down a warmer world * Planting new forests may be a low-cost way to combat warming temperatures in urban areas, suggests a new study. In a large-scale field experiment, researchers planted 640 tree saplings across 20 parks in Dayton, Ohio, and implemented varying irrigation methods. After monitoring sapling survival, growth and health in response to their irrigation m  more