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 | |
|---|---|
| main topic | natural environment |
| Dewey Decimal | 354 |
| Library of Congress | GE |
| Universal Decimal | 502/504 |
Wikimedia Commons has media related to Environment.
Note: Works about the environment are found in Category:Environmental mass media.