HEET is a Cambridge-based group that organizes energy-upgrade work parties in the buildings of nonprofits (such as churches, food pantries and preschools).
Cambridge in Bloom is dedicated to enhancing local green spaces in Cambridge through public-private partnerships.
Friends of Fresh Pond Reservation (FFPR) is a volunteer citizens' group that works with the Cambridge Water Department and the Cambridge Public Schools to help fulfill educational and conservation goals.
Green Cambridge advocates for environmental issues in the city of Cambridge.
Cambridge Recycling Program encourages people to consume less, reuse and donate materials, and recycle what cannot be eliminated or re-used.
Charles River Conservancy The Charles River Conservancy is a non-profit citizens advocacy group dedicated to the renewal and stewardship of the 400 acres of Charles River parklands from the Boston Harbor to the Watertown Dam
The Charles River Watershed Association's mission is to use science, advocacy and the law to protect, preserve and enhance the Charles River and its watershed.