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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 Coalbed methane in the United States ： ウィキペディア英語版 Coalbed methane in the United States The 2011 production of coalbed methane in the United States was 1.76 trillion cubic feet (TCF), 7.3 percent of all US dry gas production that year. The 2011 production was down from the peak of 1.97 TCF in 2008.〔US Energy Information Administration, (Coalbed methane production ), accessed 9 Oct. 2013.〕 Most coalbed methane production came from the Rocky Mountain states of Colorado, Wyoming, and New Mexico. Coalbed methane reserve estimates vary; however a 1997 estimate from the U.S. Geological Survey predicts more than of methane within the US. At a natural gas price of US$6.05 per million Btu (US$5.73/GJ), that volume is worth US$4.37trillion. At least of it is economically viable to produce. ==History== Coalbed methane grew out of venting methane from coal seams. Some coal beds have long been known to be "gassy," and as a safety measure, boreholes were drilled into the seams from the surface, and the methane allowed to vent before mining. Methane produced in connection with coal mining is usually called "coal mine methane." 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「Coalbed methane in the United States」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.