350 Contra Costa is a home base and welcoming front door to mobilize environmental activism in our county.

We are concerned citizens taking action for a better community.

No special skills required,  just a sincere interest!

We are a local affiliate of 350 Bay Area.



We envision a world where all people equitably share clean air, water and soil

in a healthy, sustainable, and post-carbon future.


WHY 350?

To preserve our planet, scientists tell us we must reduce the amount of CO2 in the atmosphere from its current level of over 400 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.