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Natural resource | Definition, Examples, & Facts | Britannica
Natural resource - Wikipedia
Natural resources (article) | Khan Academy
Natural Resources - Definition, Types, Examples, & Diagram
Conserving Earth - National Geographic Society
What are Natural Resources? | Earth.Org
Natural resource management - Wikipedia
Natural resources (video) | Khan Academy
Natural resource Definition & Meaning - Merriam-Webster
What Are Natural Resources? | SpringerLink