ODP - Open Directory Project
"The Open Directory Project is the largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors."
Regional: North_America: United_States: Rhode_Island: Localities: P: Providence: Science_and_Environment:
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See also:
- Groundwork Providence - Environmental non-profit working to improve the urban environment. In addition to information about the group's projects, provides profiles of city natural areas and advice on topics ranging from recycling to bikes..
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