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  • Citizens League for Environmental Action Now - CLEAN provides scientific evidence on the health effects of air pollution.
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  • Friends of Hermann Park - Non-profit citizens' organization dedicated to the protection and enhancement of Hermann Park. Features organization information, events and activities, constructions projects, and park maps.
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  • Houston Astronomical Society - A research and education society, includes information about the society, membership, observatory, and projects.
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  • Houston Audubon Society - History, brief descriptions of 16 sanctuaries, education programs, and events.
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  • Trees for Houston - Non-profit organization dedicating to preserving woodlands and planting trees. Offers programs and special event information, planting schedule, volunteer opportunities, and contributor list.
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Last update: February 3, 2015 at 6:45:02 UTC - edit