Energy consumption of computers in the USA

Energy in the United States describes energy and electricity production, consumption and import in the United States. Energy policy in the United States describes the public policy of the United States related to energy. Electricity sector of the United States is the main article of electricity in the US.

The United States is the largest energy consumer in terms of total use, using 100 quadrillion BTUs (105 exajoules, or 29 PWh) in 2005. This is three times the consumption by the United States in 1950.[1] The U.S. ranks seventh in energy consumption per-capita after Canada and a number of small countries.[2][3]

The vast majority of this energy is derived from fossil fuels: in 2005, it was estimated that 40% of the nation's energy came from petroleum, 23% from coal, and 23% from natural gas. Nuclear power supplied 8.4% and renewable energy supplied 7.3%, which was mainly from hydroelectric dams although other renewables are included such as wind power, geothermal and solar energy.[4] Energy consumption has increased at a faster rate than energy production over the last fifty years in the U.S.(when they were roughly equal). This difference is now largely met through imports.[1]

According to the Energy Information Administration's statistics, the per-capita energy consumption in the US has been somewhat consistent from the 1970s to today. The average has been 335.9 million BTUs per person from 1980 to 2006. One explanation suggested for this is that the energy required to produce the increase in US consumption of manufactured equipment, cars, and other goods has been shifted to other countries producing and transporting those goods to the US with a corresponding shift of green house gases and pollution. In comparison, the world average has increased from 63.7 in 1980 to 72.4 million BTU's per person in 2006. On the other hand, US "off-shoring" of manufacturing is sometimes exaggerated: US domestic manufacturing has grown by 50% since 1980.

The development of renewable energy and energy efficiency marks "a new era of energy exploration" in the United States, according to President Barack Obama.