350 is a global, people-led movement pushing to end fossil fuels and power up clean, safe and affordable energy for all.

It is a reference to 350 parts per million (ppm) – the concentration of carbon dioxide (CO2) in the atmosphere considered the safe limit to avoid the worst impacts of climate change. We are currently …

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!

Mar 27, 2026 · Discover the latest updates and inspiring stories from 350.org's global climate action efforts, showcasing their commitment to a sustainable future.

350 Mass 350 Mass is a statewide, volunteer-led climate action network with 17 “nodes”, or chapters, all over Massachusetts. 350 Mass volunteers work together to mobilize their communities, reach out to …

1.5˚C might not sound like a big increase in temperature, but it’s the difference between life and death for thousands of people.

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 …

17th November, 2025 – Belém, Brazil — As COP30 enters its second week, global support for establishing a Transition Away from Fossil Fuels (TAFF) Roadmap is accelerating at remarkable …

There is a global movement, and communities are taking back their power with solutions to climate change. Join 350.org to power up, just reliable and affordable renewable energy.

Check out our 2023 Annual Report, where we shine a light on the amazing power of community and collaboration! Together, we’re making strides toward a brighter future!