SanDiego350 is an inclusive volunteer organization building a movement to prevent the worst impacts of climate change and climate injustice. We strive to create a future that supports a livable planet and just society through education and outreach, public policy advocacy, and mobilizing people to take action.


Our vision is for an informed, mobilized and united community that is empowered to reduce our carbon footprint, and hold our elected officials accountable for creating a low-carbon, sustainable and just world. Our power comes from our alliance with social justice, environmental, labor, health, faith and other partners.

People and Teams

Meet our Board members and staff.  SanDiego350 has 14 volunteer teams, working on public policy, community education, youth engagement, organizing actions, coalition building, fundraising, and member engagement. Learn more about our teams.

Recent Accomplishments

Read more about our accomplishments in mobilizing support for climate action, policy advocacy, and youth empowerment.

Theory of Change

We need a mass grassroots movement to change the status quo and overcome the finances and political influence of the fossil fuel industry. Our movement must be racially diverse, intergenerational, and intersectional and prioritize people, the planet, and justice to succeed – climate justice is connected to other justice issues and shares many of the same roots; the environmental movement lacks the political power to succeed on its own. We work to empower and engage youth because they represent the moral imperative and have the most to lose.

Why 350? What’s that?

350 is the number that leading scientists say is the safe upper limit for carbon dioxide (CO2) in our atmosphere. CO2 is measured in “parts per million” (ppm). For millions of years before the industrial revolution that number was roughly 270. We’re currently at about 417 ppm, and adding about 2 ppm per year. We must stop emitting greenhouse gases and bring that number back down to 350 as fast as possible. The current level of CO2 is in the side bar on the right.

350.org was founded in 2008 by a group of university friends along with author Bill McKibben, who wrote one of the first books on global warming for the general public, with the goal of building a global climate movement.

SanDiego350 is an affiliate of 350.org, but we’re a completely separate organization. We make our own decisions, set our own campaign priorities and do our own fundraising.


In September 2011 we brought together hundreds of San Diego County residents, and we collectively called on our elected representatives to take immediate, strong action on climate change as part of 350.org’s international day of action on climate change. After that event, we decided to form a group and started organizing San Diegans to take action on climate change. We’ve organized San Diego’s largest climate mobilizations, including the 5,500-person “People’s Climate March” in April 2017 and the climate walkouts in 2019. In 2014 we became a 501(c)(3) nonprofit organization and in 2016 we brought on our first staff person.


The organization’s policies are in the password-protected SanDiego350 internal web pages. Members may request access by emailing volunteer@sandiego350.org.


SanDiego350 Team Building Meeting January 2017 at Palomar Unitarian Universalist Fellowship in Palomar