In the past 30 years, the U.S. has imported more than 91 billion barrels of oil, drawing from a large variety of sources.
Read more: http://tinyurl.com/y8w5b3r9
In the past 30 years, the U.S. has imported more than 91 billion barrels of oil, drawing from a large variety of sources.
Read more: http://tinyurl.com/y8w5b3r9