In recent years, the proportion of renewables in the United States’ energy mix has increased. Nevertheless, fossil fuels - primarily petroleum, natural gas, and coal – are still predominant sources of energy consumption in the country. Recently, natural gas was the largest source of energy for electricity. However, It is expected that renewable capacity will continue to increase under pressure from the public concerned with climate change and improvements in renewable technologies and costs.
In 1992, the Energy Policy Act prompted the beginning of the deregulation of the electricity sector, which was established primarily to increase clean energy use and energy efficiency. The deregulation of the electricity market still varies by state; one example being the deregulation of the market in Texas in 2002, which has allowed the majority of consumers to choose their service from several retail providers.