Timberland owned by Plum Creek Timber Co, the largest private U.S. landowner, is seen near Jackman, Maine, May 25, 2012. Timber harvesters like Plum Creek are expected to be helped by a recovery in U.S. housing demand during the next two years. Picture taken May 25, 2012. REUTERS/Ernest Scheyder (UNITED STATES - Tags: ENVIRONMENT BUSINESS CONSTRUCTION)