America's Forests
1999 Health UpdateIntroduction
Forest wildfire threat (fuel—live and dead vegetation—buildups)
Invasion of exotic (nonnative invasive) pests
Wildland/urban interface
Loss of biodiversity
Air pollution
Degraded riparian areas
Changed ecological conditions
Contact Us  | Forest Service Home Page  | Forest Health Home Page
Wildfire Threat Changed Ecological Conditions Loss of Biodiversity Air Pollution Invasion of Exotic Pests Wildland/Urban Interface Degraded Riparian Areas