structural:summarization
Energy

Energy economic theories hold that rates of energy consumption and energy efficiency are linked causally to economic growth. The Garrett Relation holds that there has been a fixed relationship between current rates of global energy consumption and the historical accumulation of world GDP, independent of the year considered. It follows that economic growth, as represented by GDP growth, requires higher rates of energy consumption growth. Seemingly paradoxically, these are sustained through increases in energy efficiency. Increases in energy efficiency were a portion of the increase in Total factor productivity. Some of the most technologically important innovations in history involved increases in energy efficiency. These include the great improvements in efficiency of conversion of heat to work, the reuse of heat, the reduction in friction and the transmission of power, especially through electrification. There is a strong correlation between per capita electricity consumption and economic development.