Among the three main energy sources used in the USA, which generates the most electricity?

• A. Coal
• B. Oil
• C. Natural Gas
• D. Nuclear

Answer: (B)

Electricity generation from different fuels isn’t equal, and which fuel leads can change as technology and prices evolve. In the United States, natural gas has become the largest single source of electricity among the fossil fuels. This is because gas-fired, combined-cycle plants are very efficient and can ramp up quickly to meet demand, and the shale gas boom lowered prices and increased supply. Oil is not a major electricity source today; it’s expensive and mostly used for transportation fuels and some niche applications, so its share of electricity generation is small. Coal has declined in many regions as natural gas became cheaper and environmental concerns led to plant retirements, though it still contributes a meaningful portion in some areas. Nuclear and renewable sources also add substantial shares, but when you look at the fossil-fuel contributions, natural gas generates the most electricity.