Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Great Smoky Mountains National Park' has mentioned 'Air pollution' in the following places:
Occurrence Sentence Text Source
Contents 1 History 2 Cultural importance 3 Geology 4 Environment 4.1 Climate 4.2 Air pollution 5 Biology and ecology 5.1 Fish 5.1.1 List of fish 6 Attractions and activities 6.1 Hiking 6.2 Other activities 7 Historic areas within the national park 7.1 Historic districts 7.2 Individual listings 8 See also 9 Notes 10 References 11 External links
Air pollution[edit]
The park is affected by air pollution because of increased development.
Air pollution from outside park boundaries diminishes park views, damages plant life and degrades high elevation streams and soils.