Sign Up for 350 Mass

We are building a Mass movement for our climate

We organize from the Berkshires to Boston

We lobby 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

Mocking the King
Nov 10, 2025

Mocking the King

A day before the October 18 No❌Kings demonstration, Indivisible’s co-founder Ezra Levin said something that set me thinking: “Make it fun. Let’s have some fun! They want us...
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350, No Kings, and the Climate
Nov 04, 2025

350, No Kings, and the Climate

Check out this blog by 350 Mass member Sabine von Mering, originally appearing on Mass 50501's blog page. The number 350 is significant for all life on...
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