Help 350.org build a powerful climate movement. We believe in a safe climate and a better future — a just, prosperous, and equitable world built with the power of ordinary people. Help us get there!

What's in a name? Ours, 350, is a number. And a very important one. It is a reference to 350 parts per million (ppm) – the concentration of carbon dioxide (CO2) in the atmosphere considered the safe …

Help 350.org build a powerful climate movement. We believe in a safe climate and a better future — a just, prosperous, and equitable world built with the power of ordinary people.

Jan 26, 2026 · Discover the latest updates and inspiring stories from 350.org's global climate action efforts, showcasing their commitment to a sustainable future.

Jan 28, 2026 · Explore the latest news, press releases and media resources from 350.org, our campaigns and the movement for a world powered by just and accessible renewable energy.

But 350 is more than a number—it’s a symbol of where we need to head as a planet. We believe that a global grassroots movement can hold our leaders accountable to the realities of science and the …

Climate change affects us all but makes inequalities even deeper. 350.org is fighting for climate solutions rooted in justice, putting people and communities first.

Join the Boston node of 350 Mass! 350 Mass is made up of hundreds of highly engaged volunteers all over the state, supported by staff from Better Future Project. 350 Mass educates the public about …

Whether you’re educating your community, running a pressure campaign to pass a climate-friendly policy, or implementing local climate solutions, you can find resources for your projects on 350.org.

Remembering 350.org in your estate planning is one of the most meaningful gifts you can offer to future generations. A bequest is a gift made through your will or trust. It is a popular and flexible way to …