Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Chaco Culture' has mentioned 'Pollution' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| [8] Other measures attempt to safeguard the area's ancient ambiance and mystique, such as the "Chaco Night Sky Program", which seeks to eliminate the effect of light pollution on the park's acclaimed night skies;[51] under the program, some 14,000 visitors make use of the Chaco Observatory (inaugurated in 1998), park telescopes, and astronomy-related programs. | WIKI |