Air pollution is shrinking scenic views, damaging plants, and degrading high elevation streams and soils in the Great Smoky Mountains. Even human health is at risk. Most pollution originates outside the park and is created by power plants, industry, and automobiles.
[{"glaciers": "n/a", "shrinking": "n/a", "heights": "n/a"}]
[{"glaciers": "n/a", "shrinking": "n/a", "heights": "n/a"}]