| Acoustical Society of America - Greater Boston Chapter: Includes meeting schedules and topics, along with membership information. |
| AlongTheCharles.com: Photos of wildlife and sights along with maps of the Charles River. |
| Blue Hill Observatory: The oldest continually-operated weather observatory in the U.S. Offers guided tours on weekends. Includes weather archives, a photo gallery, information for teachers, and current conditions. |
| Camnet: Blue Hill: Real-time air pollution visibility camera network. |
| Friends of Boston Harbor Islands, Inc.: Provides tours, trail maintenance, and advocacy for preservation of the Boston Harbor Islands. Includes information about the islands, an event calendar, a newsletter, and information about volunteering. |
| Friends of Breakheart Reservation: Volunteer organization dedicated to the preservation and improvement of Breakheart Reservation and Camp Nihan. Contains a list of activities, downloadable maps, and membership information. |
| Greater Boston Mass Spectrometry Discussion Group: For individuals engaged or interested in all aspects of mass spectrometry. Contains event schedule, employment ads, and membership information. |
| Greater Boston Physicians for Social Responsibility: Affiliate of the Physicians for Social Responsibility, focusing on the linkages between environmental exposures and health. Includes detailed information on current projects, report purchase forms, and membership information. |
| Toxic Air Pollution: Table showing summary information and detailed information on PM-10 concentrations reported at individual monitoring stations for Boston and nearby communities. From the Natural Resources Defense Council. |
| Zoo New England: Franklin Park Zoo in Boston and Stone Zoo in Stoneham. General information, virtual tour, animal pictures, volunteer information, and conservation plans. |
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