Public policies such as appliance and vehicle efficiency standards and building codes are responsible for at least 20% of the improvement in the US's energy intensity--energy use per unit of GDP. (Source: Institute for 21st Century Energy)
In 2007, the average monthly residential electricity consumption was 936 kWh. (Source: EIA)
The United States makes up 5% of the world's population and accounts for 25% of total energy use.