Trees die all the time—the forest ecosystem, in fact, depends on it, as old trees fall to the ground, decay, and provide nutrition for animals, insects, plants, and the young trees that will grow up to replace them. But when humans and trees live in close proximity, as in a neighborhood, we have to take steps and intervene in this natural process for the sake of safety. But how can you tell when a tree is sick or damaged and needs to be cut down? Here are three signs that it’s time to call for expert tree removal in Charleston, SC.