The United States petroleum industry's cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.
在这十年结束之前,美国石油工业达到环保标准的成本预计为每桶精炼石油价格的10%。
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The biggest is America's 727m-barrel strategic petroleum reserve (SPR), which lurks in caverns in Texas and Louisiana.