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History of the oil shale industry in the United States : ウィキペディア英語版 | History of the oil shale industry in the United States The history of the oil shale industry in the United States goes back to the 1850s; it dates back farther as a major enterprise than the petroleum industry. But although the United States contains the world’s largest known resource of oil shale, the US has not been a significant producer of shale oil since 1861. There were three major past attempts to establish an American oil shale industry: the 1850s; in the years during and after World War I; and in the 1970s and early 1980s. Each time, the oil shale industry failed because of competition from cheaper petroleum. As of 2014, there are a number of companies doing research and development on oil shale deposits in Colorado and Utah, but there is no commercial production of oil from shale in the United States. ==US oil shale resources== (詳細はウィキペディア(Wikipedia)』 ■ウィキペディアで「History of the oil shale industry in the United States」の詳細全文を読む
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