Trees are exceedingly useful. They clean our air, cool our communities, and make the landscape beautiful. We use them for food, shade, building material, fuel, erosion control, barriers, and many other things. Some look at trees and see an art medium, a canvas to express something we wouldn’t otherwise see. And there are quite a few different ways of using trees as art. Despite the title, these ten artists in an article I posted at mental_floss don’t sit in trees and paint; they make art out of trees.