Earth, water, wind, and sun, our energy alternatives
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Discusses energy sources that are possible substitutes for fossil fuels, including geothermal power, water power, wind and solar energy.
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Discusses energy sources that are possible substitutes for fossil fuels, including geothermal power, water power, wind and solar energy.
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"Discusses energy sources that are possible substitutes for fossil fuels, including geothermal power, water power, wind and solar energy."
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