The past two decades have transformed how interest groups, social movement organizations, and individuals engage in collective action. Meanwhile, the climate change advocacy landscape, previously dominated by well-established environmental organizations, now accommodates new ones focused exclusively on this issue. What binds these closely related trends is the rapid diffusion of communication technologies like the internet and portable devices such as smartphones and tablets. Before the diffusion of digital and mobile technologies, collective action, whether channeled through interest groups or social movement organizations, consisted of amassing and expending resources—money, staff, time, etc.—on behalf of a cause via top-down organizations. These resource expenditures often took the form of elite persuasion: media outreach, policy and scientific expertise, legal action, and lobbying. But broad diffusion of digital technologies has enabled alternatives to this model to flourish. In some cases, digital communication technologies have simply made the collective action process faster and more cost-effective for organizations; in other cases, these same technologies now allow individuals to eschew traditional advocacy groups and instead rely on digital platforms to self-organize. New political organizations have also emerged whose scope and influence would not be possible without digital technologies. Journalism has also felt the impact of technological diffusion. Within networked environments, digital news platforms are reconfiguring traditional news production, giving rise to new paradigms of journalism. At the same time, climate change and related issues are increasingly becoming the backdrop to news stories on topics as varied as politics and international relations, science and the environment, economics and inequality, and popular culture. Digital communication technologies have significantly reduced the barriers for collective action—a trend that in many cases has meant a reduced role for traditional brick-and-mortar advocacy organizations and their preferred strategies. This trend is already changing the types of advocacy efforts that reach decision-makers, which may help determine the policies that they are willing to consider and adopt on a range of issues—including climate change. In short, widespread adoption of digital media has fueled broad changes in both collective action and climate change advocacy. Examples of advocacy organizations and campaigns that embody this trend include 350.org, the Climate Reality Project, and the Guardian’s “Keep It in the Ground” campaign. 350.org was co-founded in 2007 by environmentalist and author Bill McKibben and several of his former students from Middlebury College in Vermont. The Climate Reality project was founded under another name by former U.S. Vice President and Nobel Prize winner Al Gore. The Guardian’s “Keep It in the Ground” fossil fuel divestment campaign, which is a partnership with 350.org and its Go Fossil Free Campaign, was launched in March 2015 at the behest of outgoing editor-in-chief Alan Rusbridger.