In the United States, electricity is produced by a mix of different sources. As of recent data, the largest producers of electricity by energy source are:
1. **Natural Gas**: Natural gas is the largest source of electricity generation in the U.S., accounting for about 40% of total electricity production. It's used in gas-fired power plants, which are capable of quickly adjusting their output to meet changing demand.
2. **Nuclear Power**: Nuclear power plants produce about 19% of the country's electricity. They provide a steady, reliable supply of electricity and have low greenhouse gas emissions.
3. **Coal**: Coal-fired power plants have historically been a major source of electricity, but their share has declined in recent years due to environmental concerns and the availability of cheaper natural gas. Coal currently generates about 18% of U.S. electricity.
4. **Renewable Energy**: Renewables, including wind, solar, hydropower, and biomass, contribute around 20% of electricity production. Wind and solar are the fastest-growing sources of electricity in the U.S. due to decreasing costs and increasing adoption.
5. **Hydropower**: Hydropower is a significant source of renewable energy, particularly in regions with large rivers. It contributes about 6% to the total electricity production.
The mix of these sources varies by region, with some areas relying more heavily on certain types of energy based on local resources, policies, and economic factors.