350.org is turning the page on the fossil fuel industry and building a clean, just future by connecting powerful grassroots climate movements around the world.

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 …

350.org is building a global grassroots movement to solve the climate crisis. Our online campaigns, grassroots organizing, and mass public actions are led from the bottom up by thousands of volunteer …

Many climate scientists consider 350 ppm the safe upper limit for atmospheric CO2 to maintain a stable climate. And we’ve already exceeded the threshold for climate safety by a significant margin.

Besides 350.org, she currently serves on the Board of Directors of the ACLU of Northern California and Oasis Legal Services, a nonprofit law firm providing asylum services to LGBTQIA+ refugees.

Nov 17, 2025 · In just nine days, support for a fossil fuel phase-out road map has grown from 1 to 62 countries, from both developed and developing countries, analysis by 350.org shows.

Communities worldwide are resisting fossil fuel expansion and leading the way for solutions to climate change. Join 350.org to power up just, reliable and affordable renewable energy.

Ahead of the UN COP15 Summit in Copenhagen and 350.org’s first Global Day of Action, people in 181 countries mobilize to demand a binding climate treaty to stay below 350 parts per million (350 ppm) …

Today, 350.org works in almost every country in the world on campaigns like fighting coal power plants in India, stopping the Keystone XL pipeline in the U.S, and divesting public institutions everywhere …

Ready to take on the climate crisis? Join 350.org’s global team and help drive the movement for climate justice. We’re hiring smart, passionate people to make a real difference - come work with us!