Not able to be made again quickly by nature or by people.

To use again.

Something found in nature that people can use.

Something that people make or grow, usually to sell.

Not abundant.

A natural substance found in rocks.

A natural resource, such as coal, oil, or natural gas, burned to make heat or energy.

The protecting of natural resources and the using of them wisely.

Able to be made or grown again by nature or people.