The International Society of Arboriculture (ISA) has served the tree care industry for
over eighty years as a scientific and educational organization. ISA continues to be a
dynamic medium through which arborists around the world share their experience and
knowledge for the benefit of society. ISA, aligned on many fronts with other green
organizations, is working hard to foster a better understanding of trees and tree care
through research and the education of professionals as well as global efforts to inform
tree care consumers.