natural resources - materials from the environment that are useful to people, fossil fuels - made from decaying plant and animal , renewable resources - materials that the earth can produce again, nonrenewable resources - natural resources that will eventually be used up and can never be replaced , alternative energy sources - sources of energy that do not come from fossil fuels , thermal energy - heat energy, geothermal energy - heat energy naturally produced within earth, hydroelectric power - electricity made from the energy of moving water , conservation - the practice of decreasing the use of natural resources, biofuels - fuels made from organic matter,

Earth`s Resources Vocabulary

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