Air Quality in the National Parks 2nd Edition

EPA - AIRNow - Publications

JAMA March 6, 2002 - Lung Cancer, Cardiopulmonary Mortality, and Long Term Exposure to Fine Particulate Air Pollution (PDF 157 kb)

National Park Service Research

Southeast Grandfathered Plants

The State of the Nation's Ecosystems - Heinz Center

USGS - The Effects of Atmospheric Nitrogen Deposition in the Rocky Mountains of Colorado and Southern Wyoming -- a Synthesis and Critical Assessment of Published Results