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https://www.eia.gov/tools/faqs/faq.cfm?id=427&t=3
What is U.S. electricity generation by energy source?
In 2015, the United States generated about 4 trillion kilowatthours of electricity.1 About 67% of the electricity generated was from fossil fuels (coal, natural gas, and petroleum).
Major energy sources and percent share of total U.S. electricity generation in 2015:1
Coal = 33%
Natural gas = 33%
Nuclear = 20%
Hydropower = 6%
Other renewables = 7%
Biomass = 1.6%
Geothermal = 0.4%
Solar = 0.6%
Wind = 4.7%
Petroleum = 1%
Other gases =