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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク National Petroleum Reserve–Alaska ： ウィキペディア英語版 National Petroleum Reserve–Alaska The National Petroleum Reserve in Alaska (NPRA) is an area of land on the Alaska North Slope owned by the United States federal government and managed by the Department of the Interior, Bureau of Land Management (BLM).〔 It lies to the west of the Arctic National Wildlife Refuge, which, as a U.S. Fish and Wildlife Service managed National Wildlife Refuge, is also considered federal land. At a size of , the NPRA is the largest tract of undisturbed public land in the United States.〔 Inupiat live in several villages around its perimeter, the largest of which is Barrow, the seat of the North Slope Borough. ==Oil and gas reserves== An assessment by the United States Geological Survey (USGS) in 2010 estimated that the amount of oil yet to be discovered in the NPRA is only one-tenth of what was believed to be there in the previous assessment, completed in 2002.〔(USGS Oil and Gas Resource Estimates Updated for the National Petroleum Reserve in Alaska (NPRA) ), USGS press release, 26 October 2010〕 The 2010 USGS estimate says the NPRA contains approximately "896 million barrels of conventional, undiscovered oil".〔 The reason for the decrease is because of new exploratory drilling, which showed that many areas that were believed to hold oil actually hold natural gas. The estimates of the amount of undiscovered natural gas in the region also fell, from "61 trillion cubic feet of undiscovered, conventional, non-associated gas" in the 2002 estimate, to in the 2010 estimate.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National Petroleum Reserve–Alaska」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.