energy source, where energy comes from (e.g., sun, coal, wind), fuel, material such as coal, gas, or oil that is burned to generate heat or power, fossil fuels, coal, oil, and gas – formed from ancient plants and animals, generate, to produce or make (e.g., electricity), solar panels, devices that turn sunlight into electricity, wind turbines, tall towers with blades that use wind to make electricity, transform, to change from one form into another, power station, a large factory that generates electricity.

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