Spring mornings on Main Street in Mount Kisco smell like wet pavement and new leaves, and the Kisco River runs high enough to hear from the sidewalk. Green Outdoors Tree Service opens its season there, in village yards where an oak older than the house stands ten feet from a bedroom window. Pruning is the quiet answer to that: the dead limbs cut away, the weight taken off the branch over the roof, the tree kept and the worry gone. Removals come only when a tree is truly done, and they come down neatly between the garage and the fence. After a storm, cleanup means chipping on site and leaving the lawn combed flat behind you.