uranium , an example of nuclear fuel, radioactive, plutonium is a .... material., waves, ... are source of water power in the sea., nuclear, uranium and plutonium are .... fuels., solar, ... energy is energy from the sun, renewable, the sun and the wind provide .... energy., dam, a wall built across the river to stop its flow, petrol, a type of fuel used in cars, generator, a machine that produces electrical power, wind, moving air that is a source of clean energy, coal, black substance from the earth that can be burned, dioxide, we breathe out carbon ....

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