As a group focused on mitigating the impacts of climate change and injustices, 350.org’s name originates from 350 parts per million (ppm), the scientifically determined safe upper limit of carbon dioxide (CO2) in our atmosphere.
For millions of years leading up to the industrial revolution, our atmosphere averaged roughly 270ppm of CO2. As humans began burning coal, oil, and gas, and the use of fossil fuels skyrocketed, so did atmospheric levels of CO2. Our atmosphere currently holds over 417ppm of CO2, with an increasing trend of about 2 additional ppm units per year.
To protect the biosphere, local and global communities, younger generations, and the future of our planet, we must eliminate greenhouse gas emissions and reduce CO2 levels to below the 350ppm safety threshold as quickly as possible.
350.org was founded by a group of university friends, including Bill McKibben, in 2008, with the goal of building a global climate movement. McKibben wrote one of the first books on global warming for the general public.
SanDiego350 is an affiliate of 350.org, but we are a completely separate organization. Although founded on the same principals and guiding practices, we make our own decisions, set our own campaign priorities, and do our own fundraising. We attribute our success to our hundreds of dedicated volunteers who make up more than 15 volunteer teams, our donors, and the rest of our SanDiego350 community.