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Natural environment - Wikipedia
The Nature Conservancy: A World Where People & Nature Thrive
Conserving Earth - National Geographic Society
Ecosystem - National Geographic Society
Ecology - National Geographic Society
The Planet - National Geographic
Environment | Conservation, Ecology & Sustainability | Britannica
When we protect nature, nature protects us - UN Environment …
Ecosystem | Definition, Components, Examples, Structure, & Facts
What is nature? - Encyclopedia of the Environment