; and (B) if properly preserved, will be an enduring resource as wildernesses and wildland areas and of biodiversity for the benefit of the people of the United States; (2) the Northern Rockies Bioregion— (A) contains the most diverse array of wildland that remains in the United States south of Canada; (B) provides a sanctuary for species listed as threatened or endangered under the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq.); (C) is national interest public land that is among the most popular wildland in the United States; and (D) embraces greater ecosystems and national treasures such as the Greater Yellowstone, Greater Glacier/Northern Continental Divide, Greater Hells Canyon/Wallowa, Greater Salmon/Selway, and Greater Cabinet/Yaak/Selkirk ecosystems; (3) the natural ecosystems in the Northern Rockies Bioregion are largely dependent on— (A) public land; and (B) the ecological productivity and diversity of resources on public land; (4) conservation of roadless areas on public land— (A) produces clean water; (B) protects native fisheries and native flora and fauna; (C) provides scenic and recreational qualities; and (D) preserves options for sustainable economics through activities such as hunting, fishing, and wilderness-based recreation; (5) the headwaters of several major river systems, including the Columbia, Snake, Green, Missouri, and Saskatchewan Rivers, are in the Northern Rockies Bioregion, and the water of those rivers— (A) flows to 3 oceans; (B) is of economic importance to farming and ranching operations, municipal water supplies, and water-based recreation, including fishing and boating; and (C) if protected, will enhance the uses described in subparagraph (B), reduce costs for water treatment and irrigation, and increase native fish populations; (6) the wildlife treasures of the Northern Rockies Bioregion are of international significance and contain intact, large mammalian fauna and rare and unique plant life