350.org is a large environmentalist activist organization that has a presence in 188 countries. Focused on online campaigning, 350.org opposes new oil, gas, and coal exploration and development and calls for “[revoking] the “social license” of the fossil fuel industry and “[taking] money out of the companies that are heating up the planet.”
350.org takes an uncompromising stand against oil, gas, and coal, the industry, and its leaders. The organization ties traditional progressive refrains about climate change and the need to transition to clean energy to more radical calls for extreme left-wing policy. 350.org frames the fight for renewable energy as one that pits the poor against the rich, the oppressed against the powerful, and the disadvantaged against the privileged.  The organization sometimes weighs in on issues that appear unrelated to the environment, such as a Missouri grand jury’s decision not to indict a police officer after a police shooting in Ferguson, to show support for other liberal groups. 
Founding and History
350.org was founded in 2008 by Middlebury College professor and journalist Bill McKibben. Its name comes from McKibben’s view that the world will not be safe from global warming unless the concentration of carbon dioxide in the atmosphere falls to 350 parts per million or below. 
Over its first decade, 350.org has organized protests around the world, many of which have resulted in civil disobedience and arrests; led campaigns to divest from fossil fuels; and pressured governments to adopt progressive policies against the cheapest forms of energy. 350.org claims credit for then-Senator Barack Obama’s global warming platform during his 2007-2008 Presidential campaign. 
After his election, determined to pressure Obama and other political leaders to take dramatic action against fossil fuels, the group led the International Day of Climate Action in October 2009, which it called the largest environmental protest ever. These rallies occurred in the lead-up to the December 2009 United Nations Copenhagen climate change conference, the outcome of which—a non-binding agreement—was widely regarded as a failure by environmental activists. McKibben himself later dismissed the United States’ actions in Copenhagen as “a farce.”
A year later, 350.org supported the UK-based 10:10 climate change protests on October 10, 2010, which demanded a 10% reduction in carbon emissions that year.
Angered at the Republican takeover of the House of Representatives in 2010, 350.org began 2011 with a 10,000-person “climate conference and training” in Washington, DC, called Power Shift 2011, where attendees were joined by controversial former Obama “green jobs czar” Van Jones and AFL-CIO labor union federation president Richard Trumka. 
McKibben used his speech to assail libertarian philanthropists Charles and David Koch, the U.S. Chamber of Commerce, and Obama administration Secretary of the Interior Ken Salazar. 
The next year, 350.org organized Climate Impacts Day, which aimed to “connect the dots” between global warming and extreme weather and give “a human face” to those affected by climate change. 
And in 2014, as the UN held that year’s climate summit in New York, 350.org responded by holding the first People’s Climate March through the city.  The organization was successful in helping to orchestrate a seven-year “review” of the Keystone Pipeline that concluded with its rejection by then-president Barack Obama, an action ultimately reversed by the subsequent Trump Administration.
Supporters of 350.org have been arrested on numerous occasions, including in 2013 at the White House.  McKibben was arrested in 2015 for blocking access to a gas pump and in 2016 at a lake in upstate New York during activist opposition to a proposed gas storage location.  
The organization has taken a strong stance against the Trump administration and its policies, issuing denunciations of President Donald Trump, his Cabinet, and the administration’s actions. “Trump is trying to hand over senior federal positions directly to fossil fuel industry puppets and climate deniers, and we won’t let him get away with it,” Executive Director May Boeve said in a January 5, 2017 press release.  EPA Administrator Scott Pruitt, Secretary of State Rex Tillerson, and Energy Secretary Rick Perry are those most frequently singled out for criticism.
350.org’s website lists its allies, which include Amnesty International; the College Democrats of America; Greenpeace; Oxfam; Sierra Club; the Unitarian Universalist Ministry for the Earth; anti-vaccine advocate Robert F. Kennedy Jr.’s Waterkeeper Alliance; and the World Carfree Network, which opposes the use and sale of private motor vehicles. 
Some vegan environmental activists who are displeased that Bill McKibben and 350.org do not criticize meat consumption have attacked the organization on that issue.  Allies of McKibben have responded by accusing vegan advocates of racism and of being insensitive to the needs of poor people for whom what to eat is not a choice. 
In September 2020, 350.org was one of 100 environmentalist organizations that opposed the Democratic-led Clean Economy Jobs and Innovation Act (HR 4447) because while it pushed environmental regulations, it did not directly restrict fossil fuel production.  The organizations sent a letter to Congress that accused legislators of sacrificing communities to climate change, and said that the bill offered false solutions to the “climate crises across [the] country and world.” 
The organization employs a staff of more than 100 people, who are based in dozens of cities around the world.  Its board of directors includes Bill McKibben and eight other longtime progressive activists, one of whom, Naomi Klein, is also well known for her anti-Israel views.  350.org has a 501(c)(4) sister organization, 350.org Action, which engages in political work and evaluates candidates for office.  Many staffers work for both organizations.
350.org does not disclose its donors. However, it has admitted to receiving funding from the Tides Foundation, a San Francisco-based donor-advised fund that has funneled hundreds of millions of dollars to liberal groups from donors and foundations wishing to remain anonymous.  Groups linked to George Soros and Tom Steyer have also contributed extensively to 350.org. 
Another major donor appears to be the Foundation for the Carolinas (FFTC), a donor-advised fund provider. The charitable foundation service FoundationSearch reports two $3 million donations from FFTC to 350.org, one each for donation years 2016 and 2017.  The $6 million from FFTC equals 19.6 percent of combined revenue 350.org reported for 2016 and 2017.   A major FFTC account holder and large donor to numerous left-of-center environmentalist organizations is North Carolina billionaire Fred Stanback.  Stanback was characterized in an April 2018 Knoxville News report as a “known proponent of anti-humanist environmentalism [. . .] the belief that protecting the environment hinges on population control.”