USA Today: Years of drought and high temperatures are thinning forests in the upper Great Lakes and the eastern United States, NASA satellites show.
Nearly 40% of the Mid-Atlantic's forests lost tree canopy cover, ranging from 10% to 15% between 2000 and 2010, according to a NASA study released this week. Other afflicted areas include southern Appalachia, the southeastern coast and to a lesser extent, the Rocky Mountains and the Sierra Nevada.
"There has been a series of summers growing seasons for...