Volunteer organization working to improve the water quality of Crooked Creek and its tributaries and to preserve and enhance natural habitats in the watershed and to increase public awareness. Includes map and information on history, projects and area attractions.

Seeks to protect and preserve ecological sites in Central Pennsylvania. Find photos, description of services and contact details.

Serve the professional and commercial interests of member firms that provide or utilize geological services.

Information on the state's latest lighting situation with photos, links, guidance on how to help with glare, light trespass and skyglow caused by light pollution. Includes information on creating local ordinances, and contacts.

Find links, events, and information on this non-profit, professional organization involved in the prevention of vector borne illnesses.

Congressman John Murtha's page focusing on outdoors, recreation, travel, tourism, sports, and such leisure activities as trails and boating within this section of Western Pennsylvania.

COPA advocates sound scientific management of all wildlife and natural resources and provides networking and support to wildlife and waterway officials.

Helps establish and support environmental advisory councils. Provides resources and ideas to municipal councils.

Learn about the changing of leaves in the Autumn, why it happens, and places to see the change; also includes web cams and photographs of various parts of the state.

User friendly information on various environmental topics. Focus on Pennsylvania, but not area limited.

Preserves Pennsylvania's largest freshwater tidal marsh.

Pennsylvania-based research and development firm exploring the integration of technology, nature and humanity into everyday existence. Includes brief introduction and contacts.

A nonprofit organization that battles littering and illegal trash dumping through community cleanups, education, increased enforcement, and promoting specialty recycling programs. Information on projects, and beautification resources.

Coalition of dozens of grassroots groups working to protect and inmprove the environment in Pennsylvania.

Profiles state environmental resources, policies, and programs.

Environmental education and advocacy, statewide. Discusses current issues and describes land use and water resources improvement projects around the state.

Removes illegally dumped trash in state forests and parks. Includes information on community involvement, volunteer opportunities, news, cleanups, illegal dump sites and recycling options.

Dedicated to the preservation of wetlands and waterfowl in the state. Membership, photos, chat, forum and contact.

Invests in clean energy, renewable energy, and energy conservation. Provides information about the fund's investment policies, projects, and programs.