Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Puerto-Princesa Subterranean River National Park' has mentioned 'Pollution' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| Water quality in the underground river, invariably affected by upstream activities in the catchment area, as well as concerns about pollution inputs to the river, need to be addressed in the management guidelines. | UNESCO |