caption: DeKalb resident <PERSON>, who became a master naturalist in 2010 and also volunteers at DeKalb County forest preserves, said trees are full of nutrients and it helps the soil when fungi and insects break the tree down on its own. ``It's not fast and doesn't give the look that people want, but it helps the circle of life,'' <PERSON> said. <PERSON> said, however, that ash trees are known to be prone to falling where it might need to be taken down before it falls.