U.S. Economic Energy Efficiency: 1950-2008

How is energy related to economic output? Energy is the underpinning of all modern society, as our economy and society would grind to a halt without gasoline, electricity, and other similar forms of energy [1]. Since energy plays such an important role in the nation

As the above graph illustrates, the amount of energy (in BTU) required to produce a dollar of GDP has been dropping steadily, from close to 20,000 BTU in 1949 to 8,500 BTU in 2008. Just how fast has that drop been occurring?

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