350.org is building a global grassroots movement to solve the climate crisis.

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 organizers in over 188 countries.

350 means climate safety. To preserve our planet, scientists tell us we must reduce the amount of CO2 in the atmosphere from its current level of 392 parts per million to below 350 ppm. But 350 is more than a number—it's a symbol of where we need to head as a planet.

350.org works hard to organize in a new way—everywhere at once, using online tools to facilitate strategic offline action. We want to be a laboratory for the best ways to strengthen the climate movement and catalyze transformation around the world.

We operate at a large scale to take on the world's greatest challenge. We think we can turn the tide on the climate crisis--but only if we work together. If an international grassroots movement holds our leaders accountable to realities of science and principles of justice, we can realize the solutions that will ensure a better future for all.

1. Our online campaigns, grassroots actions, and mass public actions are led from the bottom up by thousands of volunteer organizers in 188 countries.

2. 350 means climate safety. To preserve our planet, scientists tell us we must reduce CO2 in the atmosphere from current levels of 392 down to 350.

3. 350.org works hard to organize in a new way—everywhere at once, using online tools to facilitate strategic offline action and real-world impact.

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