| Chicago Astronomical Society: Formed in 1865, CAS serves as the world's oldest association focused on astronomy. Features details of its annual AstroFest event. Holds monthly meetings and programs on the third Friday of the month, usually at Adler Planetarium. |
| Chicago Ornithological Society: A modern birding club that promotes the scientific and educational aspects of ornithology; image galleries, education activities, meetings and programs, rare bird alerts, media library and membership information. |
| Chicago Recycling Coalition: Promotes recycling, source reduction and composting by working with individuals, community groups and environmental groups. Includes drop-off sites, programs, ways to help, and contact details. |
| Chicago Society of Space Studies: A Chapter of the National Space Society; features information on space exploration and the solar system, monthly meeting calendar, society history and membership information. |
| Down the Drain, Chicago's Sewers: Provides a history of the sewer system. |
| Hyde Park Parakeets: Provides nesting maps, photographs, scientific abstracts and newspaper articles on parakeets, including feral monk parakeets. |
| Keep Chicago Beautiful (KCB): Offers programs and services to support good solid waste management practices. Includes guides and resources to reduce, reuse and recycle, along with ways to get involved for students and teachers. |
| Project Exploration: Focused on natural science education and serves the community through its youth development, school services and exhibits and technology programs. Information on expeditions, dinosaurs, teacher packages, and contacts. |
| Zygon Center for Religion and Science: Relates religious traditions and scientific knowledge. Newsletter, articles and archives are featured. Program arm of the Lutheran School of Theology at Chicago (LSTC) in collaboration with the Center for Advanced Study in Religion and Science (CASIRAS). |
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