Oil and natural gas are found all over the world in varying concentrations. Sixty-two percent of the crude oil and petroleum products that the United States uses comes from North America with two of the largest producers being Canada and Mexico. The majority of America’s natural gas is produced domestically. The United States produced 20.6 trillion cubic feet (TCF) of natural gas in 2008—about 88 percent of U.S. consumption.
Throughout history, about 1 trillion barrels of oil have been produced. By today's estimates, there are about 2 trillion barrels of recoverable conventional oil resources worldwide, 6 quadrillion cubic feet of proven reserves of natural gas and 3 to 6 trillion barrels in additional frontier resources like extra heavy oil, oil sands and oil shale. Currently, there is enough oil and natural gas to supply the world’s energy needs for generations to come. And more is being discovered every day.
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