We are building a Mass movement for our climate

We organize from the Berkshires to Boston

Sign Up for 350 Mass

We advocate for climate justice on Beacon Hill

We collaborate with organizations across Massachusetts

We mobilize with marches and protests

We are building a powerful statewide movement to end the destructive dominance of the fossil fuel industry and transition to a just, equitable, and clean energy economy.

Take Action

There are many ways to fight for climate justice. Find out how you can get involved.

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Find Your Local Node

We have local member-led chapters we call “nodes”. Find one near you.

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Our Working Groups

Working groups are spaces for 350 Mass volunteers interested in special topic areas to meet, learn, and strategize.

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Power Lines: News from the Mass climate movement

Hearing Recap: The Value of Mass Save
Jun 05, 2026

Hearing Recap: The Value of Mass Save

Hear from the experts: The Value of Mass Save Hearing and what's next.  Clean energy experts, policy experts, contractors and affordable housing developers gathered for a virtual...
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Looking forward to abandonment
Mar 04, 2026

Looking forward to abandonment

Looking forward to abandonment A vision for the post-industrial-capitalist, eco-socialist future By Quinton Y. Zondervan February 2026   Oligarchs and imperial governments are actively...
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