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In 1964, Congress established the National Wilderness Preservation System and designated the first Wilderness Areas in passing the Wilderness Act. The uniquely American idea of wilderness has become an increasingly significant tool to ensure long-term protection of natural landscapes. Wilderness protects the habitat of numerous wildlife species and serves as a biodiversity bank for many species of plants and animals. Wilderness is also a source of clean water.\n\nThe Federal Land Policy and Management Act of 1976 directed the BLM to inventory and study its roadless areas for wilderness characteristics. To be designated as a WSA, an area has to have the following characteristics: \n\nSize - roadless areas of at least 5,000 acres of public lands or of a manageable size; \n\nNaturalness - generally appears to have been affected primarily by the forces of nature; \n\nOpportunities - provides outstanding opportunities for solitude or primitive and unconfined types of recreation, and \n\nSpecial Qualities- WSAs often have special qualities such as ecological, geological, educational, historical, scientific and scenic values.\n\nIn June 2000, the BLM responded to growing concern over the loss of open space by creating the NLCS. The NLCS brings into a single system some of the BLM's premier designations. By putting these lands into an organized system, the BLM hopes to increase public awareness of these areas' scientific, cultural, educational, ecological and other values.\n\nAs early as 1926, the earliest advocates of wilderness preservation had acknowledged the beauty and important ecological values of the desert lands under the BLM\u2019s administration as candidates for wilderness protection. \n\nIn 1976, Congress directed the BLM to evaluate all of its land for the presence of wilderness characteristics, and identified areas became WSAs. The establishment of a WSA served to identify areas for Congress to consider for addition to the National Wilderness Preservation System. \n\nToday, the BLM manages WSA that contain about 12.6 million acres of public land. 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