Some U.S. states are defined by their sweeping forests—vast stretches of green that blanket mountains, valleys, and coastlines alike. These wooded regions don’t just provide breathtaking scenery; they ...

Why some U.S. cities are so much greener than others. Ever since I first visited D.C., I was in awe of how full of trees it was. Rock Creek Park, one of the oldest city parks in the United States, is ...