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Building on data that is more comprehensive and reliable than ever before, covering 234 countries and territories, the Global Forest Resources Assessment 2015 shows encouraging signs of improved forest management and a global slowdown in deforestation. However these trends need to be strengthened, especially in countries that are lagging behind.
Rangelands comprise between 40 and 50 percent of all U.S. land and serve the nation both as productive areas for wildlife, recreational use, and livestock grazing and as watersheds. The health and management of rangelands have been matters for scientific inquiry and public debate since the 1880s, when reports of widespread range degradation and livestock losses led to the first attempts to inventory and classify rangelands. Scientists are now questioning the utility of current methods of rangeland classification and inventory, as well as the data available to determine whether rangelands are being degraded. These experts, who are using the same methods and data, have come to different conclusions. This book examines the scientific basis of methods used by federal agencies to inventory, classify, and monitor rangelands; it assesses the success of these methods; and it recommends improvements. The book's findings and recommendations are of interest to the public; scientists; ranchers; and local, state, and federal policymakers.
Forest resource growth, harvests, and land use conversion can change inventories within States, among regions, and even among countries, and can significantly influence the future performance of resources. This could affect the State, regional, and national economies that depend on the affected resources, as well as the resource environments. Periodic surveys provide information needed to assess the current status and performance of resources, and to estimate their future condition. As required by the Forest and Rangeland Renewable Resources Planning Act of 1974 (RPA), P.L. 93-378, 88 Stat. 4765, as amended, this report updates information on the Nation?s forest resource. This report updates resource statistics published by Smith et al. (2001). For brevity and balance in presenting reporting periods in tabular outputs, RPA Assessment data for 1963, 1970, and 1992 have been omitted from this report. To provide a context for evaluating and interpreting changes in the forest resource, data for 1953, 1963 (some tables), 1977, 1987, and 1997 are included. A forest type map produced from satellite imagery displaying the area and location of forest land in the United States is available on the Internet at http://www.nationalatlas.gov. A compact disk (CD) is provided in a pocket at the back of this publication that contains the data used for this report and an interactive computer tool for accessing and displaying the data in tables and maps. A user manual with tutorials is provided on the CD.