2025 Metro Mayors Coalition (MMC) Climate Summit
2025 Metro Mayors Climate Summit
Ten Years of Climate Action
On Monday, May 12, 2025, the mayors and managers from the Metro Mayors Coalition (MMC) came together at the Museum of Science in Boston to celebrate the ten-year anniversary of the adoption of the 2015 MMC Climate Commitment, and the work accomplished thus far.
At the event, they also signed an updated 2025 MMC Climate Commitment, reiterating their shared commitment to advancing regional climate efforts.

Back row, left to right: Brookline Town Manager Chas Carey, Arlington Town Manager Jim Feeney, Revere Mayor Patrick Keefe, Newton Mayor Ruthann Fuller, Malden Mayor Gary Christenson, U.S. Senator Edward Markey, and Watertown Town Manager George Proakis.
Front row, left to right: MAPC Deputy Executive Director Lizzi Weyant, MAPC Executive Director Marc Draisen, Melrose Mayor Jennifer Grigoraitis, Boston Mayor Michelle Wu, Medford Mayor Breanna Lungo-Koehn, Somerville Mayor Katjana Ballantyne, Chelsea City Manager Fidel Maltez, and Cambridge City Manager Yi-An Huang.
Ten Years of Climate Wins

A graphic of white and yellow text over a blue background providing facts of the past ten years. Text reads: 10 years. 17 commitments. 1.6 million residents. Key achievements: all communities have: adopted the stretch code or higher, achieved green communities designation, and passed complete street policies. Additional text says: 16 communities have a climate action plan. 14 communities participate in green municipal aggregation programs. 14 communities have completed or are in the process of MVP 2.0 designation. 12 communities have community first partnership programs. 12 communities offer blue bikes. 6 communities have urban forestry plans. 5 communities are SolSmart designated. 5 communities offer heat pump coaches.
MMC Cities and Towns
Arlington
Boston
Braintree
Brookline
Cambridge
Chelsea
Everett
Lynn
Malden
Melrose
Medford
Newton
Quincy
Revere
Somerville
Watertown
Winthrop
Climate Summit Photo Gallary
Click on each photo to see a full size of it. Unless otherwise noted, photos are to the credit of MAPC.
View the event agenda for more context of the photos.

Event Media Coverage
- Greater Boston municipal leaders recommit to climate goals (May 13, 2025) | CommonWealth Beacon
- Local leaders recommit to regional response to climate crisis (May 12, 2025) | WGBH
- Greater Boston Mayors Reaffirm Climate Commitment (May 12, 2025) | WBZ Newsradio 1030