In 2008, the United States consumed an estimated 99.2 quadrillion BTUs of energy. 99.2 Quadrillion. That's 99.2 thousand million million. 99,200,000,000,000,000. 9.92 x 10^16.For perspectives sake, one BTU is 1,055 joules - the amount of energy needed to heat 1 pound of water from 39°C to 40°C
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