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The per capita data for many countries may be slightly inaccurate as population data may not be for the same year as the consumption data. Population data were obtained mainly from the IMF [ 3 ] in 2021 with some exceptions, in which case they were obtained from the Wikipedia pages for the corresponding countries/territories.
Despite its geological significance, Earth's interior heat contributes only 0.03% of Earth's total energy budget at the surface, which is dominated by 173,000 TW of incoming solar radiation. [7] This external energy source powers most of the planet's atmospheric, oceanic, and biologic processes.
Total energy consumption tends to increase by about 1–2% per year. [5] More recently, renewable energy has been growing rapidly, averaging about 20% increase per year in the 2010s. [6] [7] Two key problems with energy production and consumption are greenhouse gas emissions and environmental pollution.
An energy audit is an inspection, survey and analysis of energy flows for energy conservation in a building, process or system to reduce the amount of energy input into the system without negatively affecting the output(s).
Measurable energy conservation and efficiency gains in the 1980s led to the 1987 Energy Security Report to the President (DOE, 1987) that "the United States uses about 29 quads less energy in a year today than it would have if our economic growth since 1972 had been accompanied by the less- efficient trends in energy use we were following at ...
Energy mix of the United Kingdom over time. Total energy consumption in the United Kingdom was 142.0 million tonnes of oil equivalent (1,651 TWh) in 2019. [2] In 2014, the UK had an energy consumption per capita of 2.78 tonnes of oil equivalent (32.3 MWh) compared to a world average of 1.92 tonnes of oil equivalent (22.3 MWh). [3]
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Renewable energy is found to be an efficient way to ensure energy independence and security. It also supports the transition to a low carbon economy and society. [7] Ways to manage the variability of renewable energy – such as little solar power on cloudy days – include dispatchable generation and smart grids.