Invasive Plant Species Invasive species in the PA flora
Biodiversity Environmental Resources Research Institute, Penn State University
Pennsylvania Biological Survey
Pennyslvania Gap Analysis Project
Pennsylvania Native Plant Society
Pennsylvania Natural Diversity Inventory
Pennsylvania Virtual Birding Site
Pennsylvania Wild Resources Conservation Fund
The Nature Conservancy
Environmental Organizations PennFuture
Pennsylvania Audubon Society
Pennsylvania Environmental Defense Foundation
Pennsylvania Environmental Council
Pennsylvania Public Interest Research Group (PIRG)
Fisheries/aquatic life Pennsylvania Trout
Forests and forestry Pennsylvania Bureau of Forestry
School of Forest Resources, Penn State University
Sustainable Forestry Initiative of Pennsylvania
Geographic Information Pennsylvania Atlas
Pennsylvania Geography
Pennsylvania Geographer (Journal)
Pennsylvania Spatial Data Access (PASDA)
Pennsylvania Topographic Maps
Geology Earth and Mineral Science Library, Pennsylvania Resources, Penn State University
Geological Maps of Pennsylvania Counties
Landforms of Pennsylvania
Mining and Mineral Resources Web Sites
Pennsylvania - A Keystone Geology
Pennsylvania Geological Survey
Pennsylvania Office of Mineral Resources Management
USGS Programs in Pennsylvania
Governmental Agencies

National Park Service
Natural Resources Conservation Service
Penn State Cooperative Extension
Pennsylvania Association of Conservation Districts
Pennsylvania Department of Agriculture
Pennsylvania Department of Conservation and Natural Resources
Pennsylvania Department of Environmental Protection
Pennsylvania Fish and Boat Commission
Pennsylvania Game Commission
Pennsylvania Natural Resources Conservation Service
Pennsylvania State Parks
U.S. Army Corps of Engineers
U.S. Department of Interior
U.S. Environmental Protection Agency
U.S. Fish and Wildlife Service

U.S. Forest Service
U.S. Geological Survey

Recycling/composting Pennsylvania Composting Page
Pennsylvania Recycling Page
Soils Pennsylvania Soil Survey
Solid wastes/landfills Welcome to Pennsylvania, America Dumps Here

Sustainable

Communities/Development

Canaan Valley Institute
Center for Rural Pennsylvania
10000 Friends of Pennsylvania
Water Resources Center for Watershed Stewardship, Penn State University
Delaware River Basin Commission
Pennsylvania Office of Water Management
Pennsylvania Organization of Watersheds and Rivers (POWR)
Pennsylvania Sea Grant
Pennsylvania Water Resources Directory
Pennsylvania Wild and Scenic Rivers
Stroud Water Research Center
USGS Water Quality Data Warehouse
USGS Water Resources of Pennsylvania
Water Pollution in Pennsylvania
Water Resources Education Network (WREN)
Water Resources Web Sites
Wetlands Cooperative Wetlands Center, Penn State University