The 350.org movement considers the atmospheric concentration 350ppm of CO2 as a safe upper limit. This limit was the focus a 2009 COP15 international treaty.[22] 350.org's goal is to have governments adopt policies to lower carbon dioxide emissions. In spite of this goal, "[i]n 2013, CO2 levels surpassed 400 ppm for the first time in recorded history."[23] 350.org reports: "This March [2015], global levels of CO2 passed 400 parts per million."[24]
350.org aims to build a global, grassroots movement to take on the fossil fuel industry and solve the climate crisis. Through online campaigns, grassroots organizing, and mass public actions, 350.org has mobilized thousands of volunteer organizers in over 188 countries.[citation needed]
Climate safety and climate justice for people across the globe is a critical part of 350.org's mission. By working with local community groups, 350.org aims to hold corporations and world leaders accountable to the realities of science and the principles of social justice.