what are natural resources
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nonrenewable resources
a resource of economic value that cannot be readily replaced by natural means (gas, oil)
renewable resources
a substance of economic value that can be replaced quickly (solar energy)
natural resources
materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
potential resources
resources that are known to exist and may be used in the future.
actual resources
t have been surveyed, their quantity and quality determined, and are being used.
