alternative, another choice instead of something, fossil fuel, fuel from ancient plants and animals (coal, oil, gas), electricity, power used to run machines and devices, abundant, more than enough, hydropower, energy from moving water, solar power, energy from sunlight, coal, a black rock used as fuel, natural gas, a gas used for cooking and heating, renewable, can be used again and not run out, non-renewable, cannot be replaced once used, shortage, not enough of something, dangerous, not safe, pollution, dirty or harmful substances in the environment, wind turbine, a machine that uses wind to make electricity, exhausted, very tired, use up, to use completely, solar panel, a device that turns sunlight into electricity, nuclear power, energy made from nuclear reactions

unit 10

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