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.

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 …

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 …

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.

Bill is Founder and Senior Advisor at 350.org and is the Schumann Distinguished Professor in Residence at Middlebury College in Vermont. He is a 2014 recipient of the Right Livelihood …

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 …

Feb 7, 2025 · At COP29 in Azerbaijan, 350.org and partner organizations hosted an action demanding more ambition on countries’ climate plans. Photo credit: Jason del Rosario

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 …

He is a founder of 350.org, the first planet-wide, grassroots climate change movement, which has organized twenty thousand rallies around the world in every country save North Korea, …

Uruguay is proof in point that the renewable energy transition isn’t just possible — it’s powerful. In less than a decade, the country shifted from fossil fuel dependence to sourcing over 98% of its …