The purpose of this MOU is to provide a general framework of cooperation between NASF and the Arbor Day Foundation concerning the management and delivery of the Tree City USA program. Under the administration of the Arbor Day Foundation and with the endorsement of individual State Foresters, Tree City USA will help America's communities enhance the extent and health of their urban forests. In addition, the Arbor Day Foundation in cooperation with NASF members, provides an array of complementary programs, such as Tree Line USA and Tree Campus USA, designed to further advance urban forestry programs nationwide. Such cooperation between NASF and Arbor Day Foundation will strengthen, encourage and recognize successful urban forestry programs which, in turn, will benefit the people of the United States in a national effort to sustain urban forestry.