350.org

350.org is a grassroots climate movement that organizes ordinary people to push for a faster, fairer shift from fossil fuels to renewable energy. Its name points to 350 parts per million of carbon dioxide, a level its campaigns treat as a safer ceiling for the atmosphere. The group works both locally and globally to stop new fossil fuel expansion, support clean energy, and press for climate finance.

Its broader aim is a world where communities can shape their own energy future and share the benefits of safe, affordable power. Campaigns connect neighborhood action with international pressure so climate decisions are not left only to governments and large companies.