Category:Natural environment
 | Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large. It should directly contain very few, if any, pages and should mainly contain subcategories. |
| Library cataloging and classification | |
|---|---|
| Dewey Decimal | 354 |
| Library of Congress | GE |
| Universal Decimal | 502/504 |
Subcategories
This category has the following 4 subcategories, out of 4 total.