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natural resources vocabulary

Across
A thick black or brownish liquid that comes from the ground and use in making various products such as gasoline.
A material found in nature that people and other living things use.
Fossil fuel formed from decaying plants and animals that lived on land a long time ago.
To cut back on how much you use of something.
A natural resource that cannot be replaced in a reasonable amount of time.
A fuel formed from the decayed remains ancient plants and animals.
Down
A natural resource that can be replaced within a reasonable amount of time.
A burnable gas found under ground and used as fuel.
Processing waste items, so the materials they are made of can be used to make new items.
The use of, less of something, to make its supply last longer.
To use materials over again, sometimes in a new way.