Stored underground in large salt caves in Louisiana, this stockpile is called the Strategic Petroleum Reserve, and currently contains over 600 million barrels of oil, roughly equivalent to one month's supply.
出自-2013年6月阅读原文
As a measure to counter future shortages, the American government decided to establish a stockpile of oil in caves underground
出自-2013年6月阅读原文
It then ships the gas 200 miles by pipeline to Canada, where it is pumped underground in oil recovery operations.
出自-2012年6月阅读原文