In 2010, the U.S. used 98.16 quadrillion Btu of energy in total (one Btu is equivalent to 1055 joules). Most of this energy was consumed in the form of petroleum, natural gas, and coal. Though the U.S. consumed a lot of energy in 2010, it was one year after China had surpassed the U.S. in total energy consumption; in 2009, China consumed 2.252 billion tons of oil equivalent, 4 percent more than United States’ energy consumption.
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