anything found in nature that is useful to people. - natural resource, a resource that CAN be restored or renewed. - renewable resource, a natural resource that is available in limited supply that CANNOT be replaced or renewed. - nonrenewable resource, a natural or artificial lake used to reserve or store water. - reservoir, a period of time with little rain - drought, to limit the use of something in order to protect it from waste or overuse. - conserve, chemicals and other harmful substances that can damage the water, air, or land. - pollution,

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