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Natural resource

any natural material that is used by humans, such as water, petroleum, minerals, forests and animals

Renewable Resource

a natural resource that can be replaced at the same rate at which the resource is consumed

Nonrenewable resource

a resource that forms at a rate that is much slower than the rate at which it is consumed


the process of recovering valuable or useful materials from waste or scrap; the process of reusing some items

Fossil Fuel

a nonrenewable energy resource formed from the remains of organisms that lived long ago; examples include oil, coal, and natural gas


a liquid mixture of complex hydrocarbon compounds; used widely as a fuel source

Natural Gas

a mixture of gaseous hydrocarbons located under the surface of the Earth, often near petroleum deposits; used as a fuel


a fossil fuel that forms underground from partially decomposed plant material

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